./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/uthash-2.0.2/uthash_OAT_test5-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 5e519f3a Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e319eaf-ddde-4fad-a2b7-1cdd6630dc0d/bin/utaipan-7li7fVZpFI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e319eaf-ddde-4fad-a2b7-1cdd6630dc0d/bin/utaipan-7li7fVZpFI/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e319eaf-ddde-4fad-a2b7-1cdd6630dc0d/bin/utaipan-7li7fVZpFI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e319eaf-ddde-4fad-a2b7-1cdd6630dc0d/bin/utaipan-7li7fVZpFI/config/TaipanReach.xml -i ../../sv-benchmarks/c/uthash-2.0.2/uthash_OAT_test5-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e319eaf-ddde-4fad-a2b7-1cdd6630dc0d/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e319eaf-ddde-4fad-a2b7-1cdd6630dc0d/bin/utaipan-7li7fVZpFI --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 9fd228108b00a337c799c923821cefd2f3f25ea1b43eb489705884efe2b6ca03 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-5e519f3 [2022-11-03 02:28:39,161 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-03 02:28:39,164 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-03 02:28:39,207 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-03 02:28:39,208 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-03 02:28:39,213 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-03 02:28:39,216 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-03 02:28:39,222 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-03 02:28:39,225 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-03 02:28:39,231 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-03 02:28:39,233 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-03 02:28:39,238 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-03 02:28:39,239 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-03 02:28:39,242 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-03 02:28:39,245 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-03 02:28:39,248 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-03 02:28:39,251 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-03 02:28:39,254 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-03 02:28:39,256 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-03 02:28:39,263 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-03 02:28:39,266 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-03 02:28:39,268 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-03 02:28:39,272 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-03 02:28:39,274 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-03 02:28:39,286 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-03 02:28:39,288 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-03 02:28:39,288 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-03 02:28:39,289 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-03 02:28:39,291 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-03 02:28:39,293 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-03 02:28:39,294 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-03 02:28:39,295 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-03 02:28:39,297 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-03 02:28:39,299 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-03 02:28:39,301 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-03 02:28:39,301 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-03 02:28:39,302 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-03 02:28:39,302 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-03 02:28:39,303 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-03 02:28:39,304 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-03 02:28:39,305 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-03 02:28:39,306 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e319eaf-ddde-4fad-a2b7-1cdd6630dc0d/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-03 02:28:39,362 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-03 02:28:39,362 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-03 02:28:39,363 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-03 02:28:39,363 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-03 02:28:39,364 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-03 02:28:39,365 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-03 02:28:39,365 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-03 02:28:39,365 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-03 02:28:39,366 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-03 02:28:39,366 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-03 02:28:39,367 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-03 02:28:39,368 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-03 02:28:39,368 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-03 02:28:39,368 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-03 02:28:39,369 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-03 02:28:39,369 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-03 02:28:39,369 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-03 02:28:39,369 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-03 02:28:39,370 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-03 02:28:39,371 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-03 02:28:39,371 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-03 02:28:39,371 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-03 02:28:39,372 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-03 02:28:39,372 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-03 02:28:39,372 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-03 02:28:39,372 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-03 02:28:39,373 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-03 02:28:39,373 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-03 02:28:39,373 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-03 02:28:39,374 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-03 02:28:39,374 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-03 02:28:39,375 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-03 02:28:39,375 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 02:28:39,375 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-03 02:28:39,375 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-03 02:28:39,376 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-03 02:28:39,376 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-03 02:28:39,376 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-03 02:28:39,377 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-03 02:28:39,377 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-03 02:28:39,377 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-03 02:28:39,377 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e319eaf-ddde-4fad-a2b7-1cdd6630dc0d/bin/utaipan-7li7fVZpFI/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e319eaf-ddde-4fad-a2b7-1cdd6630dc0d/bin/utaipan-7li7fVZpFI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 9fd228108b00a337c799c923821cefd2f3f25ea1b43eb489705884efe2b6ca03 [2022-11-03 02:28:39,723 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-03 02:28:39,762 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-03 02:28:39,765 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-03 02:28:39,767 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-03 02:28:39,768 INFO L275 PluginConnector]: CDTParser initialized [2022-11-03 02:28:39,770 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e319eaf-ddde-4fad-a2b7-1cdd6630dc0d/bin/utaipan-7li7fVZpFI/../../sv-benchmarks/c/uthash-2.0.2/uthash_OAT_test5-1.i [2022-11-03 02:28:39,842 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e319eaf-ddde-4fad-a2b7-1cdd6630dc0d/bin/utaipan-7li7fVZpFI/data/336088c5e/ac148d97887b41d09972c3f0232b81bf/FLAGe6c57663a [2022-11-03 02:28:40,702 INFO L306 CDTParser]: Found 1 translation units. [2022-11-03 02:28:40,702 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e319eaf-ddde-4fad-a2b7-1cdd6630dc0d/sv-benchmarks/c/uthash-2.0.2/uthash_OAT_test5-1.i [2022-11-03 02:28:40,721 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e319eaf-ddde-4fad-a2b7-1cdd6630dc0d/bin/utaipan-7li7fVZpFI/data/336088c5e/ac148d97887b41d09972c3f0232b81bf/FLAGe6c57663a [2022-11-03 02:28:40,820 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e319eaf-ddde-4fad-a2b7-1cdd6630dc0d/bin/utaipan-7li7fVZpFI/data/336088c5e/ac148d97887b41d09972c3f0232b81bf [2022-11-03 02:28:40,823 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-03 02:28:40,824 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-03 02:28:40,826 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-03 02:28:40,826 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-03 02:28:40,830 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-03 02:28:40,831 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 02:28:40" (1/1) ... [2022-11-03 02:28:40,832 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@79efb14e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:28:40, skipping insertion in model container [2022-11-03 02:28:40,832 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 02:28:40" (1/1) ... [2022-11-03 02:28:40,840 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-03 02:28:40,900 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-03 02:28:41,435 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e319eaf-ddde-4fad-a2b7-1cdd6630dc0d/sv-benchmarks/c/uthash-2.0.2/uthash_OAT_test5-1.i[33021,33034] [2022-11-03 02:28:41,667 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e319eaf-ddde-4fad-a2b7-1cdd6630dc0d/sv-benchmarks/c/uthash-2.0.2/uthash_OAT_test5-1.i[49681,49694] [2022-11-03 02:28:41,684 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 02:28:41,705 INFO L203 MainTranslator]: Completed pre-run [2022-11-03 02:28:41,762 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e319eaf-ddde-4fad-a2b7-1cdd6630dc0d/sv-benchmarks/c/uthash-2.0.2/uthash_OAT_test5-1.i[33021,33034] [2022-11-03 02:28:41,859 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e319eaf-ddde-4fad-a2b7-1cdd6630dc0d/sv-benchmarks/c/uthash-2.0.2/uthash_OAT_test5-1.i[49681,49694] [2022-11-03 02:28:41,877 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 02:28:41,918 INFO L208 MainTranslator]: Completed translation [2022-11-03 02:28:41,919 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:28:41 WrapperNode [2022-11-03 02:28:41,919 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-03 02:28:41,920 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-03 02:28:41,921 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-03 02:28:41,921 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-03 02:28:41,941 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:28:41" (1/1) ... [2022-11-03 02:28:42,006 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:28:41" (1/1) ... [2022-11-03 02:28:42,141 INFO L138 Inliner]: procedures = 177, calls = 388, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 1402 [2022-11-03 02:28:42,142 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-03 02:28:42,143 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-03 02:28:42,143 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-03 02:28:42,143 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-03 02:28:42,154 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:28:41" (1/1) ... [2022-11-03 02:28:42,154 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:28:41" (1/1) ... [2022-11-03 02:28:42,166 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:28:41" (1/1) ... [2022-11-03 02:28:42,166 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:28:41" (1/1) ... [2022-11-03 02:28:42,233 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:28:41" (1/1) ... [2022-11-03 02:28:42,250 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:28:41" (1/1) ... [2022-11-03 02:28:42,256 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:28:41" (1/1) ... [2022-11-03 02:28:42,262 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:28:41" (1/1) ... [2022-11-03 02:28:42,275 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-03 02:28:42,276 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-03 02:28:42,276 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-03 02:28:42,277 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-03 02:28:42,278 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:28:41" (1/1) ... [2022-11-03 02:28:42,286 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 02:28:42,301 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e319eaf-ddde-4fad-a2b7-1cdd6630dc0d/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:28:42,315 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e319eaf-ddde-4fad-a2b7-1cdd6630dc0d/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-03 02:28:42,346 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e319eaf-ddde-4fad-a2b7-1cdd6630dc0d/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-03 02:28:42,370 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-03 02:28:42,370 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-11-03 02:28:42,371 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-11-03 02:28:42,371 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-03 02:28:42,371 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2022-11-03 02:28:42,371 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2022-11-03 02:28:42,371 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-03 02:28:42,372 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-03 02:28:42,372 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-11-03 02:28:42,372 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-03 02:28:42,372 INFO L130 BoogieDeclarations]: Found specification of procedure memcmp [2022-11-03 02:28:42,372 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-11-03 02:28:42,373 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-03 02:28:42,373 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-03 02:28:42,373 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-03 02:28:42,373 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-03 02:28:42,718 INFO L235 CfgBuilder]: Building ICFG [2022-11-03 02:28:42,721 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-03 02:28:45,494 INFO L276 CfgBuilder]: Performing block encoding [2022-11-03 02:28:46,137 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-03 02:28:46,137 INFO L300 CfgBuilder]: Removed 83 assume(true) statements. [2022-11-03 02:28:46,143 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 02:28:46 BoogieIcfgContainer [2022-11-03 02:28:46,144 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-03 02:28:46,147 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-03 02:28:46,147 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-03 02:28:46,152 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-03 02:28:46,152 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 02:28:40" (1/3) ... [2022-11-03 02:28:46,153 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6b164f0d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 02:28:46, skipping insertion in model container [2022-11-03 02:28:46,153 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:28:41" (2/3) ... [2022-11-03 02:28:46,154 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6b164f0d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 02:28:46, skipping insertion in model container [2022-11-03 02:28:46,154 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 02:28:46" (3/3) ... [2022-11-03 02:28:46,159 INFO L112 eAbstractionObserver]: Analyzing ICFG uthash_OAT_test5-1.i [2022-11-03 02:28:46,181 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-03 02:28:46,181 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2022-11-03 02:28:46,244 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-03 02:28:46,251 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@b4f4b41, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-03 02:28:46,251 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-11-03 02:28:46,264 INFO L276 IsEmpty]: Start isEmpty. Operand has 151 states, 135 states have (on average 1.8148148148148149) internal successors, (245), 142 states have internal predecessors, (245), 11 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (11), 7 states have call predecessors, (11), 11 states have call successors, (11) [2022-11-03 02:28:46,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-03 02:28:46,274 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:28:46,275 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-03 02:28:46,276 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:28:46,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:28:46,284 INFO L85 PathProgramCache]: Analyzing trace with hash -1544350828, now seen corresponding path program 1 times [2022-11-03 02:28:46,297 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:28:46,298 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2122015849] [2022-11-03 02:28:46,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:28:46,299 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:28:46,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:28:46,507 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:28:46,508 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2122015849] [2022-11-03 02:28:46,509 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2022-11-03 02:28:46,509 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [810378058] [2022-11-03 02:28:46,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:28:46,510 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:28:46,510 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e319eaf-ddde-4fad-a2b7-1cdd6630dc0d/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:28:46,517 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e319eaf-ddde-4fad-a2b7-1cdd6630dc0d/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:28:46,534 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e319eaf-ddde-4fad-a2b7-1cdd6630dc0d/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-03 02:28:46,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:28:46,813 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 1 conjunts are in the unsatisfiable core [2022-11-03 02:28:46,820 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:28:46,843 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:28:46,844 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:28:46,844 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [810378058] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:28:46,845 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:28:46,845 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-03 02:28:46,848 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1444970685] [2022-11-03 02:28:46,849 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:28:46,853 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-03 02:28:46,854 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:28:46,893 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-03 02:28:46,894 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-03 02:28:46,900 INFO L87 Difference]: Start difference. First operand has 151 states, 135 states have (on average 1.8148148148148149) internal successors, (245), 142 states have internal predecessors, (245), 11 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (11), 7 states have call predecessors, (11), 11 states have call successors, (11) Second operand has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:28:48,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:28:48,462 INFO L93 Difference]: Finished difference Result 301 states and 538 transitions. [2022-11-03 02:28:48,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-03 02:28:48,470 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-11-03 02:28:48,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:28:48,482 INFO L225 Difference]: With dead ends: 301 [2022-11-03 02:28:48,482 INFO L226 Difference]: Without dead ends: 150 [2022-11-03 02:28:48,486 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-03 02:28:48,490 INFO L413 NwaCegarLoop]: 163 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 163 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-11-03 02:28:48,491 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 163 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-11-03 02:28:48,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2022-11-03 02:28:48,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 150. [2022-11-03 02:28:48,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 135 states have (on average 1.1925925925925926) internal successors, (161), 141 states have internal predecessors, (161), 11 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (11), 7 states have call predecessors, (11), 11 states have call successors, (11) [2022-11-03 02:28:48,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 183 transitions. [2022-11-03 02:28:48,551 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 183 transitions. Word has length 6 [2022-11-03 02:28:48,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:28:48,552 INFO L495 AbstractCegarLoop]: Abstraction has 150 states and 183 transitions. [2022-11-03 02:28:48,552 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:28:48,552 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 183 transitions. [2022-11-03 02:28:48,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-11-03 02:28:48,555 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:28:48,555 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:28:48,595 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e319eaf-ddde-4fad-a2b7-1cdd6630dc0d/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-11-03 02:28:48,782 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e319eaf-ddde-4fad-a2b7-1cdd6630dc0d/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:28:48,783 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:28:48,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:28:48,784 INFO L85 PathProgramCache]: Analyzing trace with hash -1453104004, now seen corresponding path program 1 times [2022-11-03 02:28:48,784 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:28:48,784 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [62972841] [2022-11-03 02:28:48,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:28:48,785 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:28:48,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:28:48,844 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:28:48,847 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [62972841] [2022-11-03 02:28:48,847 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2022-11-03 02:28:48,848 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1384210511] [2022-11-03 02:28:48,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:28:48,850 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:28:48,851 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e319eaf-ddde-4fad-a2b7-1cdd6630dc0d/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:28:48,857 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e319eaf-ddde-4fad-a2b7-1cdd6630dc0d/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:28:48,884 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e319eaf-ddde-4fad-a2b7-1cdd6630dc0d/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-03 02:28:49,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:28:49,177 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-03 02:28:49,180 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:28:49,209 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:28:49,209 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:28:49,210 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1384210511] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:28:49,210 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:28:49,210 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-03 02:28:49,210 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [64964695] [2022-11-03 02:28:49,210 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:28:49,211 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:28:49,211 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:28:49,212 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:28:49,212 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:28:49,212 INFO L87 Difference]: Start difference. First operand 150 states and 183 transitions. Second operand has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 2 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:28:51,291 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.17s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-11-03 02:28:53,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:28:53,375 INFO L93 Difference]: Finished difference Result 342 states and 425 transitions. [2022-11-03 02:28:53,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:28:53,390 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 2 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-11-03 02:28:53,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:28:53,392 INFO L225 Difference]: With dead ends: 342 [2022-11-03 02:28:53,393 INFO L226 Difference]: Without dead ends: 290 [2022-11-03 02:28:53,393 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:28:53,395 INFO L413 NwaCegarLoop]: 182 mSDtfsCounter, 149 mSDsluCounter, 177 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 160 SdHoareTripleChecker+Valid, 342 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:28:53,395 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [160 Valid, 342 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 4.1s Time] [2022-11-03 02:28:53,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 290 states. [2022-11-03 02:28:53,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 290 to 151. [2022-11-03 02:28:53,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 136 states have (on average 1.1911764705882353) internal successors, (162), 142 states have internal predecessors, (162), 11 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (11), 7 states have call predecessors, (11), 11 states have call successors, (11) [2022-11-03 02:28:53,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 184 transitions. [2022-11-03 02:28:53,418 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 184 transitions. Word has length 17 [2022-11-03 02:28:53,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:28:53,419 INFO L495 AbstractCegarLoop]: Abstraction has 151 states and 184 transitions. [2022-11-03 02:28:53,419 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 2 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:28:53,419 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 184 transitions. [2022-11-03 02:28:53,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-11-03 02:28:53,422 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:28:53,422 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:28:53,458 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e319eaf-ddde-4fad-a2b7-1cdd6630dc0d/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-03 02:28:53,647 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e319eaf-ddde-4fad-a2b7-1cdd6630dc0d/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:28:53,650 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:28:53,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:28:53,651 INFO L85 PathProgramCache]: Analyzing trace with hash 1038732643, now seen corresponding path program 1 times [2022-11-03 02:28:53,651 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:28:53,651 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [508048473] [2022-11-03 02:28:53,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:28:53,652 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:28:54,062 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-03 02:28:54,072 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [479489635] [2022-11-03 02:28:54,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:28:54,073 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:28:54,073 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e319eaf-ddde-4fad-a2b7-1cdd6630dc0d/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:28:54,079 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e319eaf-ddde-4fad-a2b7-1cdd6630dc0d/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:28:54,109 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e319eaf-ddde-4fad-a2b7-1cdd6630dc0d/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-03 02:28:55,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:28:55,698 INFO L263 TraceCheckSpWp]: Trace formula consists of 3112 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-03 02:28:55,705 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:28:55,824 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:28:55,824 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:28:55,928 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:28:55,928 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:28:55,929 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [508048473] [2022-11-03 02:28:55,929 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-03 02:28:55,929 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [479489635] [2022-11-03 02:28:55,929 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [479489635] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:28:55,930 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [560738966] [2022-11-03 02:28:55,953 INFO L159 IcfgInterpreter]: Started Sifa with 61 locations of interest [2022-11-03 02:28:55,953 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 02:28:55,958 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 02:28:55,964 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 02:28:55,965 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 02:28:56,129 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:28:56,155 INFO L356 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-03 02:28:56,156 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 37 [2022-11-03 02:28:56,171 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:28:56,172 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 22 [2022-11-03 02:28:56,207 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:28:56,208 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:28:56,210 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:28:56,224 INFO L356 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-03 02:28:56,225 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 43 [2022-11-03 02:28:56,243 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:28:56,244 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:28:56,272 INFO L356 Elim1Store]: treesize reduction 20, result has 48.7 percent of original size [2022-11-03 02:28:56,273 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 22 treesize of output 38 [2022-11-03 02:28:56,302 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:28:56,303 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 7 [2022-11-03 02:28:56,321 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:28:56,322 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 7 [2022-11-03 02:28:56,336 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:28:56,337 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:28:56,372 INFO L356 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-03 02:28:56,372 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2022-11-03 02:28:56,700 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 19 [2022-11-03 02:28:56,727 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 19 [2022-11-03 02:28:56,743 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 9 [2022-11-03 02:28:56,753 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2022-11-03 02:28:56,779 WARN L234 Elim1Store]: Array PQE input equivalent to false [2022-11-03 02:28:57,117 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 19 [2022-11-03 02:28:57,144 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 19 [2022-11-03 02:28:57,158 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 9 [2022-11-03 02:28:57,171 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2022-11-03 02:28:57,208 WARN L234 Elim1Store]: Array PQE input equivalent to false [2022-11-03 02:28:57,218 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 02:28:58,389 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [560738966] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:28:58,389 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-03 02:28:58,390 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [3, 3] total 11 [2022-11-03 02:28:58,390 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1432117383] [2022-11-03 02:28:58,390 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:28:58,391 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-03 02:28:58,391 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:28:58,391 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-03 02:28:58,392 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=73, Unknown=0, NotChecked=0, Total=132 [2022-11-03 02:28:58,392 INFO L87 Difference]: Start difference. First operand 151 states and 184 transitions. Second operand has 8 states, 8 states have (on average 7.625) internal successors, (61), 7 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:29:04,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:29:04,981 INFO L93 Difference]: Finished difference Result 319 states and 389 transitions. [2022-11-03 02:29:04,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-03 02:29:04,982 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 7.625) internal successors, (61), 7 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 61 [2022-11-03 02:29:04,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:29:04,983 INFO L225 Difference]: With dead ends: 319 [2022-11-03 02:29:04,984 INFO L226 Difference]: Without dead ends: 170 [2022-11-03 02:29:04,986 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 171 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=81, Invalid=101, Unknown=0, NotChecked=0, Total=182 [2022-11-03 02:29:04,987 INFO L413 NwaCegarLoop]: 156 mSDtfsCounter, 13 mSDsluCounter, 371 mSDsCounter, 0 mSdLazyCounter, 261 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 509 SdHoareTripleChecker+Invalid, 276 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 261 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.8s IncrementalHoareTripleChecker+Time [2022-11-03 02:29:04,987 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 509 Invalid, 276 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 261 Invalid, 0 Unknown, 0 Unchecked, 5.8s Time] [2022-11-03 02:29:04,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2022-11-03 02:29:05,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 161. [2022-11-03 02:29:05,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161 states, 146 states have (on average 1.178082191780822) internal successors, (172), 152 states have internal predecessors, (172), 11 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (11), 7 states have call predecessors, (11), 11 states have call successors, (11) [2022-11-03 02:29:05,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 194 transitions. [2022-11-03 02:29:05,005 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 194 transitions. Word has length 61 [2022-11-03 02:29:05,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:29:05,005 INFO L495 AbstractCegarLoop]: Abstraction has 161 states and 194 transitions. [2022-11-03 02:29:05,005 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.625) internal successors, (61), 7 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:29:05,006 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 194 transitions. [2022-11-03 02:29:05,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-11-03 02:29:05,008 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:29:05,008 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:29:05,058 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e319eaf-ddde-4fad-a2b7-1cdd6630dc0d/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-03 02:29:05,230 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e319eaf-ddde-4fad-a2b7-1cdd6630dc0d/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:29:05,231 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:29:05,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:29:05,231 INFO L85 PathProgramCache]: Analyzing trace with hash 216369794, now seen corresponding path program 1 times [2022-11-03 02:29:05,231 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:29:05,232 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1324329909] [2022-11-03 02:29:05,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:29:05,232 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:29:05,412 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-03 02:29:05,413 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [438223387] [2022-11-03 02:29:05,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:29:05,413 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:29:05,413 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e319eaf-ddde-4fad-a2b7-1cdd6630dc0d/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:29:05,414 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e319eaf-ddde-4fad-a2b7-1cdd6630dc0d/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:29:05,418 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e319eaf-ddde-4fad-a2b7-1cdd6630dc0d/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-03 02:29:06,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:29:06,565 INFO L263 TraceCheckSpWp]: Trace formula consists of 2249 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-03 02:29:06,571 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:29:06,714 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-03 02:29:06,714 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:29:06,842 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-03 02:29:06,842 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:29:06,842 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1324329909] [2022-11-03 02:29:06,842 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-03 02:29:06,843 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [438223387] [2022-11-03 02:29:06,843 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [438223387] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:29:06,843 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [684006062] [2022-11-03 02:29:06,847 INFO L159 IcfgInterpreter]: Started Sifa with 71 locations of interest [2022-11-03 02:29:06,847 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 02:29:06,848 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 02:29:06,848 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 02:29:06,849 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 02:29:06,989 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:29:07,002 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-03 02:29:07,003 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 26 [2022-11-03 02:29:07,013 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:29:07,031 INFO L356 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-03 02:29:07,031 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 37 [2022-11-03 02:29:07,071 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:29:07,072 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:29:07,102 INFO L356 Elim1Store]: treesize reduction 20, result has 48.7 percent of original size [2022-11-03 02:29:07,103 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 22 treesize of output 38 [2022-11-03 02:29:07,121 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:29:07,123 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 7 [2022-11-03 02:29:07,132 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:29:07,134 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:29:07,166 INFO L356 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-03 02:29:07,166 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2022-11-03 02:29:07,184 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:29:07,185 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:29:07,187 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 39 [2022-11-03 02:29:07,208 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:29:07,209 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 7 [2022-11-03 02:29:07,468 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 19 [2022-11-03 02:29:07,483 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 19 [2022-11-03 02:29:07,494 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 9 [2022-11-03 02:29:07,502 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2022-11-03 02:29:07,533 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 25 [2022-11-03 02:29:07,584 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-03 02:29:07,585 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 25 [2022-11-03 02:29:07,598 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 31 [2022-11-03 02:29:07,613 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 31 [2022-11-03 02:29:07,651 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 25 [2022-11-03 02:29:07,675 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 46 [2022-11-03 02:29:07,691 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 15 [2022-11-03 02:29:07,702 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2022-11-03 02:29:07,721 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 46 [2022-11-03 02:29:08,141 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 19 [2022-11-03 02:29:08,155 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 19 [2022-11-03 02:29:08,169 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 9 [2022-11-03 02:29:08,177 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2022-11-03 02:29:08,198 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 31 [2022-11-03 02:29:08,224 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 31 [2022-11-03 02:29:08,240 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 25 [2022-11-03 02:29:08,249 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 25 [2022-11-03 02:29:08,283 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 46 [2022-11-03 02:29:08,297 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 25 [2022-11-03 02:29:08,317 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 46 [2022-11-03 02:29:08,329 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2022-11-03 02:29:08,340 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 15 [2022-11-03 02:29:08,492 INFO L197 IcfgInterpreter]: Interpreting procedure #Ultimate.C_memset with input of size 78 for LOIs [2022-11-03 02:29:08,533 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 02:29:10,172 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [684006062] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:29:10,172 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-03 02:29:10,173 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [4, 4] total 17 [2022-11-03 02:29:10,173 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1210746073] [2022-11-03 02:29:10,173 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:29:10,174 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-03 02:29:10,174 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:29:10,175 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-03 02:29:10,175 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=182, Unknown=0, NotChecked=0, Total=272 [2022-11-03 02:29:10,175 INFO L87 Difference]: Start difference. First operand 161 states and 194 transitions. Second operand has 13 states, 12 states have (on average 5.666666666666667) internal successors, (68), 11 states have internal predecessors, (68), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-03 02:29:16,708 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.33s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-11-03 02:29:19,393 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.79s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-11-03 02:29:20,961 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.57s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-11-03 02:29:22,629 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.22s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-11-03 02:29:22,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:29:22,653 INFO L93 Difference]: Finished difference Result 321 states and 391 transitions. [2022-11-03 02:29:22,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-03 02:29:22,654 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 5.666666666666667) internal successors, (68), 11 states have internal predecessors, (68), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 74 [2022-11-03 02:29:22,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:29:22,655 INFO L225 Difference]: With dead ends: 321 [2022-11-03 02:29:22,655 INFO L226 Difference]: Without dead ends: 172 [2022-11-03 02:29:22,656 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 225 GetRequests, 203 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=155, Invalid=307, Unknown=0, NotChecked=0, Total=462 [2022-11-03 02:29:22,657 INFO L413 NwaCegarLoop]: 155 mSDtfsCounter, 11 mSDsluCounter, 578 mSDsCounter, 0 mSdLazyCounter, 263 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 705 SdHoareTripleChecker+Invalid, 468 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 263 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 186 IncrementalHoareTripleChecker+Unchecked, 10.4s IncrementalHoareTripleChecker+Time [2022-11-03 02:29:22,657 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 705 Invalid, 468 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 263 Invalid, 0 Unknown, 186 Unchecked, 10.4s Time] [2022-11-03 02:29:22,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2022-11-03 02:29:22,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 166. [2022-11-03 02:29:22,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 166 states, 150 states have (on average 1.1733333333333333) internal successors, (176), 156 states have internal predecessors, (176), 12 states have call successors, (12), 3 states have call predecessors, (12), 2 states have return successors, (12), 7 states have call predecessors, (12), 12 states have call successors, (12) [2022-11-03 02:29:22,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 200 transitions. [2022-11-03 02:29:22,677 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 200 transitions. Word has length 74 [2022-11-03 02:29:22,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:29:22,678 INFO L495 AbstractCegarLoop]: Abstraction has 166 states and 200 transitions. [2022-11-03 02:29:22,678 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 5.666666666666667) internal successors, (68), 11 states have internal predecessors, (68), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-03 02:29:22,678 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 200 transitions. [2022-11-03 02:29:22,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-11-03 02:29:22,681 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:29:22,681 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:29:22,727 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e319eaf-ddde-4fad-a2b7-1cdd6630dc0d/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-03 02:29:22,902 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e319eaf-ddde-4fad-a2b7-1cdd6630dc0d/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:29:22,902 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:29:22,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:29:22,903 INFO L85 PathProgramCache]: Analyzing trace with hash 2126701724, now seen corresponding path program 1 times [2022-11-03 02:29:22,903 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:29:22,903 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [659209350] [2022-11-03 02:29:22,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:29:22,903 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:29:23,065 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-03 02:29:23,065 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1934483112] [2022-11-03 02:29:23,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:29:23,065 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:29:23,066 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e319eaf-ddde-4fad-a2b7-1cdd6630dc0d/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:29:23,067 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e319eaf-ddde-4fad-a2b7-1cdd6630dc0d/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:29:23,087 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e319eaf-ddde-4fad-a2b7-1cdd6630dc0d/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-03 02:29:24,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:29:24,298 INFO L263 TraceCheckSpWp]: Trace formula consists of 2264 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-03 02:29:24,303 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:29:24,417 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-03 02:29:24,418 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:29:24,518 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-03 02:29:24,518 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:29:24,518 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [659209350] [2022-11-03 02:29:24,518 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-03 02:29:24,518 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1934483112] [2022-11-03 02:29:24,518 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1934483112] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:29:24,519 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [375494720] [2022-11-03 02:29:24,522 INFO L159 IcfgInterpreter]: Started Sifa with 71 locations of interest [2022-11-03 02:29:24,523 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 02:29:24,523 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 02:29:24,523 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 02:29:24,523 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 02:29:24,588 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:29:24,606 INFO L356 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-03 02:29:24,606 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 37 [2022-11-03 02:29:24,616 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:29:24,617 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 22 [2022-11-03 02:29:24,641 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:29:24,642 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 7 [2022-11-03 02:29:24,649 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:29:24,650 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:29:24,679 INFO L356 Elim1Store]: treesize reduction 20, result has 48.7 percent of original size [2022-11-03 02:29:24,680 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 22 treesize of output 38 [2022-11-03 02:29:24,693 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:29:24,694 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:29:24,696 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:29:24,712 INFO L356 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-03 02:29:24,712 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 43 [2022-11-03 02:29:24,731 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:29:24,732 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 7 [2022-11-03 02:29:24,743 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:29:24,744 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:29:24,780 INFO L356 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-03 02:29:24,781 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2022-11-03 02:29:25,058 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 19 [2022-11-03 02:29:25,071 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 9 [2022-11-03 02:29:25,079 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2022-11-03 02:29:25,102 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 19 [2022-11-03 02:29:25,127 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 31 [2022-11-03 02:29:25,139 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 31 [2022-11-03 02:29:25,157 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 34 [2022-11-03 02:29:25,188 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 25 [2022-11-03 02:29:25,207 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 46 [2022-11-03 02:29:25,228 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 46 [2022-11-03 02:29:25,251 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 15 [2022-11-03 02:29:25,262 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2022-11-03 02:29:25,321 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-03 02:29:25,325 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-03 02:29:25,330 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 02:29:25,348 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 64 treesize of output 63 [2022-11-03 02:29:25,355 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 66 treesize of output 65 [2022-11-03 02:29:25,362 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 64 treesize of output 63 [2022-11-03 02:29:25,382 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 02:29:25,387 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-03 02:29:25,393 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-03 02:29:25,438 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-03 02:29:25,439 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 7 [2022-11-03 02:29:25,454 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-03 02:29:25,454 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 78 treesize of output 30 [2022-11-03 02:29:25,472 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-03 02:29:25,473 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 46 treesize of output 16 [2022-11-03 02:29:25,545 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-03 02:29:25,545 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 78 treesize of output 30 [2022-11-03 02:29:25,565 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-03 02:29:25,565 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 46 treesize of output 16 [2022-11-03 02:29:25,579 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-03 02:29:25,580 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 7 [2022-11-03 02:29:35,096 WARN L234 SmtUtils]: Spent 9.43s on a formula simplification. DAG size of input: 67 DAG size of output: 32 (called from [L 353] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.Elim1Store.elim1) [2022-11-03 02:29:35,097 INFO L356 Elim1Store]: treesize reduction 340, result has 16.0 percent of original size [2022-11-03 02:29:35,127 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e319eaf-ddde-4fad-a2b7-1cdd6630dc0d/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-03 02:29:35,297 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e319eaf-ddde-4fad-a2b7-1cdd6630dc0d/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:29:35,298 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.AssertionError: var is still there: |v_#memory_$Pointer$.base_512| input size 141 context size 141 output size 141 at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.Elim1Store.elim1(Elim1Store.java:364) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.ElimStorePlain.applyComplexEliminationRules(ElimStorePlain.java:427) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionSaa.tryToEliminate(DualJunctionSaa.java:190) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionSaa.tryToEliminateOne3(DualJunctionSaa.java:172) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionSaa.tryToEliminateOne2(DualJunctionSaa.java:151) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionSaa.tryToEliminateOne1(DualJunctionSaa.java:140) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionSaa.tryToEliminateOne0(DualJunctionSaa.java:124) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionSaa.tryToEliminateOne(DualJunctionSaa.java:108) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionSaa.tryExhaustivelyToEliminate(DualJunctionSaa.java:93) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionSaa.tryToEliminate(DualJunctionSaa.java:88) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.tryToEliminateOne(QuantifierPusher.java:627) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.applyNewEliminationTechniquesExhaustively(QuantifierPusher.java:606) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.applyDualJunctionEliminationTechniques(QuantifierPusher.java:528) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.tryToPushOverDualFiniteConnective(QuantifierPusher.java:332) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.convert(QuantifierPushTermWalker.java:188) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.convert(QuantifierPushTermWalker.java:1) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine$ApplicationTermTask.doStep(TermContextTransformationEngine.java:169) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:77) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:61) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.eliminate(QuantifierPushTermWalker.java:295) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.eliminate(QuantifierPushTermWalker.java:281) at de.uni_freiburg.informatik.ultimate.lib.sifa.SymbolicTools$EliminatingTermDomainOperationProvider.newQuantifier(SymbolicTools.java:285) at de.uni_freiburg.informatik.ultimate.lib.sifa.SymbolicTools$EliminatingTermDomainOperationProvider.projectExistentially(SymbolicTools.java:267) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.TermDomainOperationProvider.projectExistentially(TermDomainOperationProvider.java:1) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateTransformer.strongestPostcondition(PredicateTransformer.java:131) at de.uni_freiburg.informatik.ultimate.lib.sifa.SymbolicTools.post(SymbolicTools.java:119) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretInternal(DagInterpreter.java:227) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretTransAndStoreLoiPred(DagInterpreter.java:209) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretTrans(DagInterpreter.java:187) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretNode(DagInterpreter.java:165) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.interpret(DagInterpreter.java:123) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.interpretLoisInProcedure(IcfgInterpreter.java:136) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.interpret(IcfgInterpreter.java:127) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:102) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:266) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:147) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:336) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:262) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:175) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2022-11-03 02:29:35,301 INFO L158 Benchmark]: Toolchain (without parser) took 54476.88ms. Allocated memory was 100.7MB in the beginning and 394.3MB in the end (delta: 293.6MB). Free memory was 76.8MB in the beginning and 170.1MB in the end (delta: -93.3MB). Peak memory consumption was 199.5MB. Max. memory is 16.1GB. [2022-11-03 02:29:35,301 INFO L158 Benchmark]: CDTParser took 0.33ms. Allocated memory is still 100.7MB. Free memory was 55.3MB in the beginning and 55.2MB in the end (delta: 86.6kB). There was no memory consumed. Max. memory is 16.1GB. [2022-11-03 02:29:35,301 INFO L158 Benchmark]: CACSL2BoogieTranslator took 1094.01ms. Allocated memory is still 100.7MB. Free memory was 76.5MB in the beginning and 48.1MB in the end (delta: 28.4MB). Peak memory consumption was 27.3MB. Max. memory is 16.1GB. [2022-11-03 02:29:35,302 INFO L158 Benchmark]: Boogie Procedure Inliner took 221.69ms. Allocated memory was 100.7MB in the beginning and 127.9MB in the end (delta: 27.3MB). Free memory was 48.1MB in the beginning and 97.2MB in the end (delta: -49.1MB). Peak memory consumption was 15.8MB. Max. memory is 16.1GB. [2022-11-03 02:29:35,302 INFO L158 Benchmark]: Boogie Preprocessor took 132.79ms. Allocated memory is still 127.9MB. Free memory was 97.2MB in the beginning and 86.1MB in the end (delta: 11.1MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2022-11-03 02:29:35,302 INFO L158 Benchmark]: RCFGBuilder took 3867.67ms. Allocated memory was 127.9MB in the beginning and 180.4MB in the end (delta: 52.4MB). Free memory was 86.1MB in the beginning and 66.0MB in the end (delta: 20.1MB). Peak memory consumption was 82.1MB. Max. memory is 16.1GB. [2022-11-03 02:29:35,303 INFO L158 Benchmark]: TraceAbstraction took 49153.06ms. Allocated memory was 180.4MB in the beginning and 394.3MB in the end (delta: 213.9MB). Free memory was 65.0MB in the beginning and 170.1MB in the end (delta: -105.1MB). Peak memory consumption was 108.1MB. Max. memory is 16.1GB. [2022-11-03 02:29:35,304 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.33ms. Allocated memory is still 100.7MB. Free memory was 55.3MB in the beginning and 55.2MB in the end (delta: 86.6kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 1094.01ms. Allocated memory is still 100.7MB. Free memory was 76.5MB in the beginning and 48.1MB in the end (delta: 28.4MB). Peak memory consumption was 27.3MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 221.69ms. Allocated memory was 100.7MB in the beginning and 127.9MB in the end (delta: 27.3MB). Free memory was 48.1MB in the beginning and 97.2MB in the end (delta: -49.1MB). Peak memory consumption was 15.8MB. Max. memory is 16.1GB. * Boogie Preprocessor took 132.79ms. Allocated memory is still 127.9MB. Free memory was 97.2MB in the beginning and 86.1MB in the end (delta: 11.1MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * RCFGBuilder took 3867.67ms. Allocated memory was 127.9MB in the beginning and 180.4MB in the end (delta: 52.4MB). Free memory was 86.1MB in the beginning and 66.0MB in the end (delta: 20.1MB). Peak memory consumption was 82.1MB. Max. memory is 16.1GB. * TraceAbstraction took 49153.06ms. Allocated memory was 180.4MB in the beginning and 394.3MB in the end (delta: 213.9MB). Free memory was 65.0MB in the beginning and 170.1MB in the end (delta: -105.1MB). Peak memory consumption was 108.1MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: AssertionError: var is still there: |v_#memory_$Pointer$.base_512| input size 141 context size 141 output size 141 de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: AssertionError: var is still there: |v_#memory_$Pointer$.base_512| input size 141 context size 141 output size 141: de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.Elim1Store.elim1(Elim1Store.java:364) RESULT: Ultimate could not prove your program: Toolchain returned no result. [2022-11-03 02:29:35,393 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e319eaf-ddde-4fad-a2b7-1cdd6630dc0d/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e319eaf-ddde-4fad-a2b7-1cdd6630dc0d/bin/utaipan-7li7fVZpFI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e319eaf-ddde-4fad-a2b7-1cdd6630dc0d/bin/utaipan-7li7fVZpFI/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e319eaf-ddde-4fad-a2b7-1cdd6630dc0d/bin/utaipan-7li7fVZpFI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e319eaf-ddde-4fad-a2b7-1cdd6630dc0d/bin/utaipan-7li7fVZpFI/config/TaipanReach.xml -i ../../sv-benchmarks/c/uthash-2.0.2/uthash_OAT_test5-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e319eaf-ddde-4fad-a2b7-1cdd6630dc0d/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e319eaf-ddde-4fad-a2b7-1cdd6630dc0d/bin/utaipan-7li7fVZpFI --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 9fd228108b00a337c799c923821cefd2f3f25ea1b43eb489705884efe2b6ca03 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-5e519f3 [2022-11-03 02:29:37,629 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-03 02:29:37,631 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-03 02:29:37,669 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-03 02:29:37,670 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-03 02:29:37,674 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-03 02:29:37,676 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-03 02:29:37,680 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-03 02:29:37,686 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-03 02:29:37,689 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-03 02:29:37,690 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-03 02:29:37,693 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-03 02:29:37,693 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-03 02:29:37,699 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-03 02:29:37,700 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-03 02:29:37,702 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-03 02:29:37,703 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-03 02:29:37,704 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-03 02:29:37,708 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-03 02:29:37,711 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-03 02:29:37,716 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-03 02:29:37,718 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-03 02:29:37,719 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-03 02:29:37,722 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-03 02:29:37,728 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-03 02:29:37,732 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-03 02:29:37,732 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-03 02:29:37,734 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-03 02:29:37,735 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-03 02:29:37,736 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-03 02:29:37,737 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-03 02:29:37,738 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-03 02:29:37,740 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-03 02:29:37,741 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-03 02:29:37,742 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-03 02:29:37,742 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-03 02:29:37,743 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-03 02:29:37,756 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-03 02:29:37,757 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-03 02:29:37,758 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-03 02:29:37,759 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-03 02:29:37,760 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e319eaf-ddde-4fad-a2b7-1cdd6630dc0d/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2022-11-03 02:29:37,800 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-03 02:29:37,800 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-03 02:29:37,802 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-03 02:29:37,802 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-03 02:29:37,803 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-03 02:29:37,804 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-03 02:29:37,804 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-03 02:29:37,804 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-03 02:29:37,804 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-03 02:29:37,805 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-03 02:29:37,806 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-03 02:29:37,806 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-03 02:29:37,808 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-03 02:29:37,808 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-03 02:29:37,808 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-03 02:29:37,809 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-03 02:29:37,809 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-03 02:29:37,809 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-03 02:29:37,809 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-03 02:29:37,810 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-03 02:29:37,810 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-11-03 02:29:37,810 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-11-03 02:29:37,810 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-03 02:29:37,811 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-03 02:29:37,811 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-03 02:29:37,811 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-03 02:29:37,812 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-03 02:29:37,812 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-03 02:29:37,812 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-03 02:29:37,812 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 02:29:37,813 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-03 02:29:37,813 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-03 02:29:37,814 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-03 02:29:37,814 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2022-11-03 02:29:37,814 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-11-03 02:29:37,815 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-03 02:29:37,815 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-03 02:29:37,815 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-03 02:29:37,816 INFO L138 SettingsManager]: * Logic for external solver=AUFBV WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e319eaf-ddde-4fad-a2b7-1cdd6630dc0d/bin/utaipan-7li7fVZpFI/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e319eaf-ddde-4fad-a2b7-1cdd6630dc0d/bin/utaipan-7li7fVZpFI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 9fd228108b00a337c799c923821cefd2f3f25ea1b43eb489705884efe2b6ca03 [2022-11-03 02:29:38,224 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-03 02:29:38,263 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-03 02:29:38,266 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-03 02:29:38,267 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-03 02:29:38,268 INFO L275 PluginConnector]: CDTParser initialized [2022-11-03 02:29:38,270 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e319eaf-ddde-4fad-a2b7-1cdd6630dc0d/bin/utaipan-7li7fVZpFI/../../sv-benchmarks/c/uthash-2.0.2/uthash_OAT_test5-1.i [2022-11-03 02:29:38,346 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e319eaf-ddde-4fad-a2b7-1cdd6630dc0d/bin/utaipan-7li7fVZpFI/data/1674be088/4d0565553b2c40e6a4d18681fef31798/FLAGc13337623 [2022-11-03 02:29:38,930 INFO L306 CDTParser]: Found 1 translation units. [2022-11-03 02:29:38,931 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e319eaf-ddde-4fad-a2b7-1cdd6630dc0d/sv-benchmarks/c/uthash-2.0.2/uthash_OAT_test5-1.i [2022-11-03 02:29:38,967 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e319eaf-ddde-4fad-a2b7-1cdd6630dc0d/bin/utaipan-7li7fVZpFI/data/1674be088/4d0565553b2c40e6a4d18681fef31798/FLAGc13337623 [2022-11-03 02:29:39,206 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e319eaf-ddde-4fad-a2b7-1cdd6630dc0d/bin/utaipan-7li7fVZpFI/data/1674be088/4d0565553b2c40e6a4d18681fef31798 [2022-11-03 02:29:39,210 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-03 02:29:39,212 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-03 02:29:39,215 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-03 02:29:39,215 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-03 02:29:39,219 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-03 02:29:39,221 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 02:29:39" (1/1) ... [2022-11-03 02:29:39,224 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@305a02d6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:29:39, skipping insertion in model container [2022-11-03 02:29:39,224 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 02:29:39" (1/1) ... [2022-11-03 02:29:39,232 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-03 02:29:39,314 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-03 02:29:39,808 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e319eaf-ddde-4fad-a2b7-1cdd6630dc0d/sv-benchmarks/c/uthash-2.0.2/uthash_OAT_test5-1.i[33021,33034] [2022-11-03 02:29:39,962 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e319eaf-ddde-4fad-a2b7-1cdd6630dc0d/sv-benchmarks/c/uthash-2.0.2/uthash_OAT_test5-1.i[49681,49694] [2022-11-03 02:29:39,969 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 02:29:39,981 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2022-11-03 02:29:39,996 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-03 02:29:40,021 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e319eaf-ddde-4fad-a2b7-1cdd6630dc0d/sv-benchmarks/c/uthash-2.0.2/uthash_OAT_test5-1.i[33021,33034] [2022-11-03 02:29:40,124 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e319eaf-ddde-4fad-a2b7-1cdd6630dc0d/sv-benchmarks/c/uthash-2.0.2/uthash_OAT_test5-1.i[49681,49694] [2022-11-03 02:29:40,127 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 02:29:40,132 INFO L203 MainTranslator]: Completed pre-run [2022-11-03 02:29:40,184 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e319eaf-ddde-4fad-a2b7-1cdd6630dc0d/sv-benchmarks/c/uthash-2.0.2/uthash_OAT_test5-1.i[33021,33034] [2022-11-03 02:29:40,285 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e319eaf-ddde-4fad-a2b7-1cdd6630dc0d/sv-benchmarks/c/uthash-2.0.2/uthash_OAT_test5-1.i[49681,49694] [2022-11-03 02:29:40,289 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 02:29:40,326 INFO L208 MainTranslator]: Completed translation [2022-11-03 02:29:40,327 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:29:40 WrapperNode [2022-11-03 02:29:40,327 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-03 02:29:40,328 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-03 02:29:40,328 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-03 02:29:40,329 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-03 02:29:40,336 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:29:40" (1/1) ... [2022-11-03 02:29:40,378 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:29:40" (1/1) ... [2022-11-03 02:29:40,453 INFO L138 Inliner]: procedures = 180, calls = 388, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 1402 [2022-11-03 02:29:40,454 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-03 02:29:40,463 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-03 02:29:40,464 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-03 02:29:40,464 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-03 02:29:40,474 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:29:40" (1/1) ... [2022-11-03 02:29:40,474 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:29:40" (1/1) ... [2022-11-03 02:29:40,501 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:29:40" (1/1) ... [2022-11-03 02:29:40,509 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:29:40" (1/1) ... [2022-11-03 02:29:40,566 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:29:40" (1/1) ... [2022-11-03 02:29:40,582 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:29:40" (1/1) ... [2022-11-03 02:29:40,587 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:29:40" (1/1) ... [2022-11-03 02:29:40,592 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:29:40" (1/1) ... [2022-11-03 02:29:40,603 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-03 02:29:40,604 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-03 02:29:40,604 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-03 02:29:40,605 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-03 02:29:40,605 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:29:40" (1/1) ... [2022-11-03 02:29:40,611 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 02:29:40,623 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e319eaf-ddde-4fad-a2b7-1cdd6630dc0d/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:29:40,641 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e319eaf-ddde-4fad-a2b7-1cdd6630dc0d/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-03 02:29:40,655 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e319eaf-ddde-4fad-a2b7-1cdd6630dc0d/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-03 02:29:40,692 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1 [2022-11-03 02:29:40,693 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2022-11-03 02:29:40,693 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-11-03 02:29:40,693 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-11-03 02:29:40,693 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2022-11-03 02:29:40,693 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2022-11-03 02:29:40,693 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-03 02:29:40,694 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-03 02:29:40,694 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-11-03 02:29:40,694 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-03 02:29:40,694 INFO L130 BoogieDeclarations]: Found specification of procedure memcmp [2022-11-03 02:29:40,694 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-11-03 02:29:40,694 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-03 02:29:40,694 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2022-11-03 02:29:40,695 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-11-03 02:29:40,695 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-03 02:29:40,695 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-03 02:29:41,056 INFO L235 CfgBuilder]: Building ICFG [2022-11-03 02:29:41,058 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-03 02:29:51,682 INFO L276 CfgBuilder]: Performing block encoding [2022-11-03 02:29:51,691 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-03 02:29:51,691 INFO L300 CfgBuilder]: Removed 83 assume(true) statements. [2022-11-03 02:29:51,693 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 02:29:51 BoogieIcfgContainer [2022-11-03 02:29:51,693 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-03 02:29:51,696 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-03 02:29:51,696 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-03 02:29:51,699 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-03 02:29:51,699 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 02:29:39" (1/3) ... [2022-11-03 02:29:51,700 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4591cf38 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 02:29:51, skipping insertion in model container [2022-11-03 02:29:51,700 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:29:40" (2/3) ... [2022-11-03 02:29:51,701 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4591cf38 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 02:29:51, skipping insertion in model container [2022-11-03 02:29:51,701 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 02:29:51" (3/3) ... [2022-11-03 02:29:51,702 INFO L112 eAbstractionObserver]: Analyzing ICFG uthash_OAT_test5-1.i [2022-11-03 02:29:51,720 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-03 02:29:51,720 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2022-11-03 02:29:51,788 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-03 02:29:51,794 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@4a6d5712, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-03 02:29:51,795 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-11-03 02:29:51,800 INFO L276 IsEmpty]: Start isEmpty. Operand has 258 states, 242 states have (on average 1.6983471074380165) internal successors, (411), 249 states have internal predecessors, (411), 11 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (11), 7 states have call predecessors, (11), 11 states have call successors, (11) [2022-11-03 02:29:51,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-03 02:29:51,806 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:29:51,807 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:29:51,808 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:29:51,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:29:51,813 INFO L85 PathProgramCache]: Analyzing trace with hash 691392686, now seen corresponding path program 1 times [2022-11-03 02:29:51,825 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:29:51,826 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [610426035] [2022-11-03 02:29:51,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:29:51,827 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:29:51,827 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e319eaf-ddde-4fad-a2b7-1cdd6630dc0d/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:29:51,834 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e319eaf-ddde-4fad-a2b7-1cdd6630dc0d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:29:51,854 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e319eaf-ddde-4fad-a2b7-1cdd6630dc0d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2022-11-03 02:29:52,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:29:52,079 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 1 conjunts are in the unsatisfiable core [2022-11-03 02:29:52,084 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:29:52,107 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:29:52,108 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:29:52,109 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:29:52,109 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [610426035] [2022-11-03 02:29:52,110 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [610426035] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:29:52,110 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:29:52,110 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-03 02:29:52,112 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1363587058] [2022-11-03 02:29:52,113 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:29:52,117 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-03 02:29:52,118 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:29:52,155 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-03 02:29:52,155 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-03 02:29:52,158 INFO L87 Difference]: Start difference. First operand has 258 states, 242 states have (on average 1.6983471074380165) internal successors, (411), 249 states have internal predecessors, (411), 11 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (11), 7 states have call predecessors, (11), 11 states have call successors, (11) Second operand has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:29:52,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:29:52,245 INFO L93 Difference]: Finished difference Result 514 states and 869 transitions. [2022-11-03 02:29:52,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-03 02:29:52,248 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2022-11-03 02:29:52,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:29:52,271 INFO L225 Difference]: With dead ends: 514 [2022-11-03 02:29:52,271 INFO L226 Difference]: Without dead ends: 254 [2022-11-03 02:29:52,275 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-03 02:29:52,279 INFO L413 NwaCegarLoop]: 341 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 341 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 02:29:52,280 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 341 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 02:29:52,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2022-11-03 02:29:52,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 254. [2022-11-03 02:29:52,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 254 states, 239 states have (on average 1.3179916317991631) internal successors, (315), 245 states have internal predecessors, (315), 11 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (11), 7 states have call predecessors, (11), 11 states have call successors, (11) [2022-11-03 02:29:52,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 254 states to 254 states and 337 transitions. [2022-11-03 02:29:52,347 INFO L78 Accepts]: Start accepts. Automaton has 254 states and 337 transitions. Word has length 8 [2022-11-03 02:29:52,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:29:52,348 INFO L495 AbstractCegarLoop]: Abstraction has 254 states and 337 transitions. [2022-11-03 02:29:52,348 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:29:52,348 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states and 337 transitions. [2022-11-03 02:29:52,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-11-03 02:29:52,351 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:29:52,351 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:29:52,370 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e319eaf-ddde-4fad-a2b7-1cdd6630dc0d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2022-11-03 02:29:52,552 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e319eaf-ddde-4fad-a2b7-1cdd6630dc0d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:29:52,552 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:29:52,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:29:52,553 INFO L85 PathProgramCache]: Analyzing trace with hash -1622673081, now seen corresponding path program 1 times [2022-11-03 02:29:52,554 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:29:52,554 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2048614983] [2022-11-03 02:29:52,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:29:52,554 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:29:52,555 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e319eaf-ddde-4fad-a2b7-1cdd6630dc0d/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:29:52,556 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e319eaf-ddde-4fad-a2b7-1cdd6630dc0d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:29:52,565 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e319eaf-ddde-4fad-a2b7-1cdd6630dc0d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2022-11-03 02:29:52,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:29:52,791 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-03 02:29:52,794 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:29:52,829 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:29:52,829 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:29:52,830 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:29:52,830 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2048614983] [2022-11-03 02:29:52,830 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2048614983] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:29:52,831 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:29:52,831 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 02:29:52,831 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1361877282] [2022-11-03 02:29:52,831 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:29:52,832 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:29:52,833 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:29:52,833 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:29:52,833 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:29:52,834 INFO L87 Difference]: Start difference. First operand 254 states and 337 transitions. Second operand has 3 states, 3 states have (on average 14.0) internal successors, (42), 3 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:29:53,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:29:53,199 INFO L93 Difference]: Finished difference Result 573 states and 768 transitions. [2022-11-03 02:29:53,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:29:53,204 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 14.0) internal successors, (42), 3 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2022-11-03 02:29:53,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:29:53,207 INFO L225 Difference]: With dead ends: 573 [2022-11-03 02:29:53,207 INFO L226 Difference]: Without dead ends: 495 [2022-11-03 02:29:53,208 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:29:53,209 INFO L413 NwaCegarLoop]: 375 mSDtfsCounter, 300 mSDsluCounter, 329 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 311 SdHoareTripleChecker+Valid, 704 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-03 02:29:53,210 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [311 Valid, 704 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-03 02:29:53,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 495 states. [2022-11-03 02:29:53,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 495 to 255. [2022-11-03 02:29:53,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 255 states, 240 states have (on average 1.3166666666666667) internal successors, (316), 246 states have internal predecessors, (316), 11 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (11), 7 states have call predecessors, (11), 11 states have call successors, (11) [2022-11-03 02:29:53,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 255 states to 255 states and 338 transitions. [2022-11-03 02:29:53,244 INFO L78 Accepts]: Start accepts. Automaton has 255 states and 338 transitions. Word has length 42 [2022-11-03 02:29:53,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:29:53,245 INFO L495 AbstractCegarLoop]: Abstraction has 255 states and 338 transitions. [2022-11-03 02:29:53,245 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.0) internal successors, (42), 3 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:29:53,245 INFO L276 IsEmpty]: Start isEmpty. Operand 255 states and 338 transitions. [2022-11-03 02:29:53,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2022-11-03 02:29:53,249 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:29:53,250 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:29:53,262 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e319eaf-ddde-4fad-a2b7-1cdd6630dc0d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2022-11-03 02:29:53,450 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e319eaf-ddde-4fad-a2b7-1cdd6630dc0d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:29:53,450 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:29:53,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:29:53,451 INFO L85 PathProgramCache]: Analyzing trace with hash 1488765968, now seen corresponding path program 1 times [2022-11-03 02:29:53,453 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:29:53,453 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1906278908] [2022-11-03 02:29:53,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:29:53,454 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:29:53,454 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e319eaf-ddde-4fad-a2b7-1cdd6630dc0d/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:29:53,455 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e319eaf-ddde-4fad-a2b7-1cdd6630dc0d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:29:53,482 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e319eaf-ddde-4fad-a2b7-1cdd6630dc0d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2022-11-03 02:29:55,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:29:55,715 INFO L263 TraceCheckSpWp]: Trace formula consists of 2104 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-03 02:29:55,723 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:29:55,764 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:29:55,764 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:29:55,764 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:29:55,765 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1906278908] [2022-11-03 02:29:55,765 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1906278908] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:29:55,765 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:29:55,765 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 02:29:55,766 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1789672714] [2022-11-03 02:29:55,766 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:29:55,767 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 02:29:55,767 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:29:55,767 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 02:29:55,768 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 02:29:55,768 INFO L87 Difference]: Start difference. First operand 255 states and 338 transitions. Second operand has 4 states, 4 states have (on average 35.0) internal successors, (140), 4 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:29:55,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:29:55,919 INFO L93 Difference]: Finished difference Result 516 states and 685 transitions. [2022-11-03 02:29:55,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-03 02:29:55,919 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 35.0) internal successors, (140), 4 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 140 [2022-11-03 02:29:55,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:29:55,921 INFO L225 Difference]: With dead ends: 516 [2022-11-03 02:29:55,921 INFO L226 Difference]: Without dead ends: 264 [2022-11-03 02:29:55,923 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 137 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:29:55,924 INFO L413 NwaCegarLoop]: 314 mSDtfsCounter, 291 mSDsluCounter, 329 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 302 SdHoareTripleChecker+Valid, 643 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:29:55,925 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [302 Valid, 643 Invalid, 68 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:29:55,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 264 states. [2022-11-03 02:29:55,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 264 to 258. [2022-11-03 02:29:55,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 258 states, 243 states have (on average 1.2798353909465021) internal successors, (311), 249 states have internal predecessors, (311), 11 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (11), 7 states have call predecessors, (11), 11 states have call successors, (11) [2022-11-03 02:29:55,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 258 states to 258 states and 333 transitions. [2022-11-03 02:29:55,942 INFO L78 Accepts]: Start accepts. Automaton has 258 states and 333 transitions. Word has length 140 [2022-11-03 02:29:55,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:29:55,942 INFO L495 AbstractCegarLoop]: Abstraction has 258 states and 333 transitions. [2022-11-03 02:29:55,943 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 35.0) internal successors, (140), 4 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:29:55,943 INFO L276 IsEmpty]: Start isEmpty. Operand 258 states and 333 transitions. [2022-11-03 02:29:55,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2022-11-03 02:29:55,945 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:29:55,946 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:29:56,006 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e319eaf-ddde-4fad-a2b7-1cdd6630dc0d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2022-11-03 02:29:56,170 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e319eaf-ddde-4fad-a2b7-1cdd6630dc0d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:29:56,171 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:29:56,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:29:56,171 INFO L85 PathProgramCache]: Analyzing trace with hash 1835639812, now seen corresponding path program 1 times [2022-11-03 02:29:56,173 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:29:56,173 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [114547504] [2022-11-03 02:29:56,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:29:56,173 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:29:56,173 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e319eaf-ddde-4fad-a2b7-1cdd6630dc0d/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:29:56,176 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e319eaf-ddde-4fad-a2b7-1cdd6630dc0d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:29:56,219 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e319eaf-ddde-4fad-a2b7-1cdd6630dc0d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2022-11-03 02:29:58,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:29:58,370 INFO L263 TraceCheckSpWp]: Trace formula consists of 2098 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-03 02:29:58,377 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:29:58,721 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:29:58,721 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:29:58,721 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:29:58,722 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [114547504] [2022-11-03 02:29:58,722 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [114547504] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:29:58,722 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:29:58,722 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 02:29:58,723 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1935291366] [2022-11-03 02:29:58,723 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:29:58,723 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:29:58,724 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:29:58,724 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:29:58,724 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:29:58,725 INFO L87 Difference]: Start difference. First operand 258 states and 333 transitions. Second operand has 3 states, 3 states have (on average 46.666666666666664) internal successors, (140), 3 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:29:59,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:29:59,338 INFO L93 Difference]: Finished difference Result 554 states and 709 transitions. [2022-11-03 02:29:59,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:29:59,349 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 46.666666666666664) internal successors, (140), 3 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 140 [2022-11-03 02:29:59,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:29:59,351 INFO L225 Difference]: With dead ends: 554 [2022-11-03 02:29:59,351 INFO L226 Difference]: Without dead ends: 299 [2022-11-03 02:29:59,352 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 138 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:29:59,353 INFO L413 NwaCegarLoop]: 325 mSDtfsCounter, 11 mSDsluCounter, 310 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 635 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-03 02:29:59,353 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 635 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-03 02:29:59,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 299 states. [2022-11-03 02:29:59,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 299 to 299. [2022-11-03 02:29:59,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 299 states, 284 states have (on average 1.2535211267605635) internal successors, (356), 290 states have internal predecessors, (356), 11 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (11), 7 states have call predecessors, (11), 11 states have call successors, (11) [2022-11-03 02:29:59,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 299 states to 299 states and 378 transitions. [2022-11-03 02:29:59,370 INFO L78 Accepts]: Start accepts. Automaton has 299 states and 378 transitions. Word has length 140 [2022-11-03 02:29:59,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:29:59,371 INFO L495 AbstractCegarLoop]: Abstraction has 299 states and 378 transitions. [2022-11-03 02:29:59,371 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 46.666666666666664) internal successors, (140), 3 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:29:59,372 INFO L276 IsEmpty]: Start isEmpty. Operand 299 states and 378 transitions. [2022-11-03 02:29:59,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2022-11-03 02:29:59,375 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:29:59,375 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:29:59,432 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e319eaf-ddde-4fad-a2b7-1cdd6630dc0d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2022-11-03 02:29:59,598 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e319eaf-ddde-4fad-a2b7-1cdd6630dc0d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:29:59,599 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:29:59,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:29:59,599 INFO L85 PathProgramCache]: Analyzing trace with hash -1891908699, now seen corresponding path program 1 times [2022-11-03 02:29:59,601 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:29:59,601 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1007418962] [2022-11-03 02:29:59,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:29:59,601 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:29:59,602 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e319eaf-ddde-4fad-a2b7-1cdd6630dc0d/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:29:59,603 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e319eaf-ddde-4fad-a2b7-1cdd6630dc0d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:29:59,641 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e319eaf-ddde-4fad-a2b7-1cdd6630dc0d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2022-11-03 02:30:01,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:30:01,389 INFO L263 TraceCheckSpWp]: Trace formula consists of 1750 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-03 02:30:01,395 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:30:01,435 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:30:01,435 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:30:01,435 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:30:01,436 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1007418962] [2022-11-03 02:30:01,436 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1007418962] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:30:01,436 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:30:01,436 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 02:30:01,436 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [474245654] [2022-11-03 02:30:01,437 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:30:01,437 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 02:30:01,437 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:30:01,438 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 02:30:01,438 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 02:30:01,438 INFO L87 Difference]: Start difference. First operand 299 states and 378 transitions. Second operand has 4 states, 4 states have (on average 37.75) internal successors, (151), 4 states have internal predecessors, (151), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-03 02:30:01,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:30:01,520 INFO L93 Difference]: Finished difference Result 557 states and 717 transitions. [2022-11-03 02:30:01,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-03 02:30:01,521 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 37.75) internal successors, (151), 4 states have internal predecessors, (151), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 155 [2022-11-03 02:30:01,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:30:01,523 INFO L225 Difference]: With dead ends: 557 [2022-11-03 02:30:01,523 INFO L226 Difference]: Without dead ends: 302 [2022-11-03 02:30:01,524 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 152 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:30:01,525 INFO L413 NwaCegarLoop]: 322 mSDtfsCounter, 2 mSDsluCounter, 637 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 959 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:30:01,525 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 959 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:30:01,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 302 states. [2022-11-03 02:30:01,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 302 to 302. [2022-11-03 02:30:01,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 302 states, 286 states have (on average 1.2552447552447552) internal successors, (359), 293 states have internal predecessors, (359), 11 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (13), 7 states have call predecessors, (13), 11 states have call successors, (13) [2022-11-03 02:30:01,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 302 states to 302 states and 383 transitions. [2022-11-03 02:30:01,553 INFO L78 Accepts]: Start accepts. Automaton has 302 states and 383 transitions. Word has length 155 [2022-11-03 02:30:01,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:30:01,555 INFO L495 AbstractCegarLoop]: Abstraction has 302 states and 383 transitions. [2022-11-03 02:30:01,556 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 37.75) internal successors, (151), 4 states have internal predecessors, (151), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-03 02:30:01,556 INFO L276 IsEmpty]: Start isEmpty. Operand 302 states and 383 transitions. [2022-11-03 02:30:01,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2022-11-03 02:30:01,561 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:30:01,562 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:30:01,602 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e319eaf-ddde-4fad-a2b7-1cdd6630dc0d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2022-11-03 02:30:01,776 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e319eaf-ddde-4fad-a2b7-1cdd6630dc0d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:30:01,777 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:30:01,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:30:01,777 INFO L85 PathProgramCache]: Analyzing trace with hash 541073415, now seen corresponding path program 1 times [2022-11-03 02:30:01,779 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:30:01,779 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1260774293] [2022-11-03 02:30:01,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:30:01,779 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:30:01,779 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e319eaf-ddde-4fad-a2b7-1cdd6630dc0d/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:30:01,780 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e319eaf-ddde-4fad-a2b7-1cdd6630dc0d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:30:01,818 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e319eaf-ddde-4fad-a2b7-1cdd6630dc0d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2022-11-03 02:30:03,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:30:03,631 INFO L263 TraceCheckSpWp]: Trace formula consists of 1772 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-03 02:30:03,638 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:30:03,688 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 02:30:03,689 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:30:03,856 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-03 02:30:03,856 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:30:03,857 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1260774293] [2022-11-03 02:30:03,857 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1260774293] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:30:03,857 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1843548583] [2022-11-03 02:30:03,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:30:03,858 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:30:03,858 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e319eaf-ddde-4fad-a2b7-1cdd6630dc0d/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:30:03,864 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e319eaf-ddde-4fad-a2b7-1cdd6630dc0d/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:30:03,898 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e319eaf-ddde-4fad-a2b7-1cdd6630dc0d/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (8)] Waiting until timeout for monitored process [2022-11-03 02:30:05,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:30:05,904 INFO L263 TraceCheckSpWp]: Trace formula consists of 1772 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-03 02:30:05,908 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:30:06,057 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-03 02:30:06,057 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:30:06,057 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1843548583] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:30:06,057 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-03 02:30:06,057 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5, 5] total 11 [2022-11-03 02:30:06,058 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [597988555] [2022-11-03 02:30:06,058 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:30:06,058 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 02:30:06,058 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:30:06,059 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 02:30:06,059 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2022-11-03 02:30:06,059 INFO L87 Difference]: Start difference. First operand 302 states and 383 transitions. Second operand has 5 states, 5 states have (on average 29.8) internal successors, (149), 5 states have internal predecessors, (149), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-03 02:30:06,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:30:06,265 INFO L93 Difference]: Finished difference Result 618 states and 797 transitions. [2022-11-03 02:30:06,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-03 02:30:06,266 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 29.8) internal successors, (149), 5 states have internal predecessors, (149), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 157 [2022-11-03 02:30:06,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:30:06,275 INFO L225 Difference]: With dead ends: 618 [2022-11-03 02:30:06,275 INFO L226 Difference]: Without dead ends: 360 [2022-11-03 02:30:06,277 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 468 GetRequests, 459 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2022-11-03 02:30:06,279 INFO L413 NwaCegarLoop]: 370 mSDtfsCounter, 275 mSDsluCounter, 734 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 286 SdHoareTripleChecker+Valid, 1104 SdHoareTripleChecker+Invalid, 102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 02:30:06,280 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [286 Valid, 1104 Invalid, 102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 02:30:06,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 360 states. [2022-11-03 02:30:06,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 360 to 311. [2022-11-03 02:30:06,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 311 states, 295 states have (on average 1.230508474576271) internal successors, (363), 302 states have internal predecessors, (363), 11 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (13), 7 states have call predecessors, (13), 11 states have call successors, (13) [2022-11-03 02:30:06,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 311 states to 311 states and 387 transitions. [2022-11-03 02:30:06,298 INFO L78 Accepts]: Start accepts. Automaton has 311 states and 387 transitions. Word has length 157 [2022-11-03 02:30:06,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:30:06,301 INFO L495 AbstractCegarLoop]: Abstraction has 311 states and 387 transitions. [2022-11-03 02:30:06,301 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 29.8) internal successors, (149), 5 states have internal predecessors, (149), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-03 02:30:06,301 INFO L276 IsEmpty]: Start isEmpty. Operand 311 states and 387 transitions. [2022-11-03 02:30:06,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2022-11-03 02:30:06,303 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:30:06,303 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:30:06,320 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e319eaf-ddde-4fad-a2b7-1cdd6630dc0d/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (8)] Forceful destruction successful, exit code 0 [2022-11-03 02:30:06,552 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e319eaf-ddde-4fad-a2b7-1cdd6630dc0d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2022-11-03 02:30:06,719 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e319eaf-ddde-4fad-a2b7-1cdd6630dc0d/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e319eaf-ddde-4fad-a2b7-1cdd6630dc0d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:30:06,720 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:30:06,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:30:06,720 INFO L85 PathProgramCache]: Analyzing trace with hash -2067714043, now seen corresponding path program 1 times [2022-11-03 02:30:06,721 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:30:06,721 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1518820113] [2022-11-03 02:30:06,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:30:06,721 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:30:06,722 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e319eaf-ddde-4fad-a2b7-1cdd6630dc0d/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:30:06,723 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e319eaf-ddde-4fad-a2b7-1cdd6630dc0d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:30:06,727 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e319eaf-ddde-4fad-a2b7-1cdd6630dc0d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2022-11-03 02:30:08,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:30:08,610 INFO L263 TraceCheckSpWp]: Trace formula consists of 1773 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-03 02:30:08,614 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:30:08,660 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 02:30:08,660 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:30:08,786 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-03 02:30:08,787 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:30:08,787 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1518820113] [2022-11-03 02:30:08,787 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1518820113] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:30:08,787 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [542708112] [2022-11-03 02:30:08,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:30:08,788 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:30:08,788 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e319eaf-ddde-4fad-a2b7-1cdd6630dc0d/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:30:08,789 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e319eaf-ddde-4fad-a2b7-1cdd6630dc0d/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:30:08,814 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e319eaf-ddde-4fad-a2b7-1cdd6630dc0d/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (10)] Waiting until timeout for monitored process [2022-11-03 02:30:10,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:30:11,027 INFO L263 TraceCheckSpWp]: Trace formula consists of 1773 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-03 02:30:11,031 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:30:11,407 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-03 02:30:11,407 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:30:11,407 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [542708112] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:30:11,407 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-03 02:30:11,408 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5, 5] total 9 [2022-11-03 02:30:11,408 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1073258290] [2022-11-03 02:30:11,408 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:30:11,408 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:30:11,409 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:30:11,409 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:30:11,409 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2022-11-03 02:30:11,409 INFO L87 Difference]: Start difference. First operand 311 states and 387 transitions. Second operand has 3 states, 3 states have (on average 49.666666666666664) internal successors, (149), 3 states have internal predecessors, (149), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-03 02:30:12,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:30:12,318 INFO L93 Difference]: Finished difference Result 805 states and 1018 transitions. [2022-11-03 02:30:12,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:30:12,319 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 49.666666666666664) internal successors, (149), 3 states have internal predecessors, (149), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 157 [2022-11-03 02:30:12,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:30:12,322 INFO L225 Difference]: With dead ends: 805 [2022-11-03 02:30:12,322 INFO L226 Difference]: Without dead ends: 538 [2022-11-03 02:30:12,322 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 468 GetRequests, 461 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2022-11-03 02:30:12,323 INFO L413 NwaCegarLoop]: 424 mSDtfsCounter, 225 mSDsluCounter, 288 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 234 SdHoareTripleChecker+Valid, 712 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-03 02:30:12,324 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [234 Valid, 712 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-11-03 02:30:12,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 538 states. [2022-11-03 02:30:12,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 538 to 536. [2022-11-03 02:30:12,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 536 states, 511 states have (on average 1.2367906066536203) internal successors, (632), 523 states have internal predecessors, (632), 20 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (24), 12 states have call predecessors, (24), 20 states have call successors, (24) [2022-11-03 02:30:12,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 536 states to 536 states and 676 transitions. [2022-11-03 02:30:12,358 INFO L78 Accepts]: Start accepts. Automaton has 536 states and 676 transitions. Word has length 157 [2022-11-03 02:30:12,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:30:12,358 INFO L495 AbstractCegarLoop]: Abstraction has 536 states and 676 transitions. [2022-11-03 02:30:12,359 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 49.666666666666664) internal successors, (149), 3 states have internal predecessors, (149), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-03 02:30:12,359 INFO L276 IsEmpty]: Start isEmpty. Operand 536 states and 676 transitions. [2022-11-03 02:30:12,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2022-11-03 02:30:12,362 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:30:12,362 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:30:12,400 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e319eaf-ddde-4fad-a2b7-1cdd6630dc0d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2022-11-03 02:30:12,592 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e319eaf-ddde-4fad-a2b7-1cdd6630dc0d/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (10)] Forceful destruction successful, exit code 0 [2022-11-03 02:30:12,776 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e319eaf-ddde-4fad-a2b7-1cdd6630dc0d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e319eaf-ddde-4fad-a2b7-1cdd6630dc0d/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt [2022-11-03 02:30:12,777 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:30:12,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:30:12,777 INFO L85 PathProgramCache]: Analyzing trace with hash -996391097, now seen corresponding path program 1 times [2022-11-03 02:30:12,778 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:30:12,778 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [696735609] [2022-11-03 02:30:12,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:30:12,778 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:30:12,778 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e319eaf-ddde-4fad-a2b7-1cdd6630dc0d/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:30:12,779 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e319eaf-ddde-4fad-a2b7-1cdd6630dc0d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:30:12,782 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e319eaf-ddde-4fad-a2b7-1cdd6630dc0d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2022-11-03 02:30:14,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:30:14,795 INFO L263 TraceCheckSpWp]: Trace formula consists of 1788 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-03 02:30:14,799 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:30:14,843 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 02:30:14,843 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:30:14,964 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-03 02:30:14,964 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:30:14,964 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [696735609] [2022-11-03 02:30:14,964 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [696735609] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:30:14,965 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [256182992] [2022-11-03 02:30:14,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:30:14,965 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:30:14,965 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e319eaf-ddde-4fad-a2b7-1cdd6630dc0d/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:30:14,971 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e319eaf-ddde-4fad-a2b7-1cdd6630dc0d/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:30:14,979 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e319eaf-ddde-4fad-a2b7-1cdd6630dc0d/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (12)] Waiting until timeout for monitored process [2022-11-03 02:30:17,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:30:17,519 INFO L263 TraceCheckSpWp]: Trace formula consists of 1788 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-03 02:30:17,523 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:30:18,487 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-03 02:30:18,487 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:30:18,487 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [256182992] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:30:18,488 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-03 02:30:18,488 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5, 5] total 9 [2022-11-03 02:30:18,488 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1541766958] [2022-11-03 02:30:18,488 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:30:18,489 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:30:18,489 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:30:18,489 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:30:18,490 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2022-11-03 02:30:18,490 INFO L87 Difference]: Start difference. First operand 536 states and 676 transitions. Second operand has 3 states, 3 states have (on average 52.0) internal successors, (156), 3 states have internal predecessors, (156), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-03 02:30:19,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:30:19,044 INFO L93 Difference]: Finished difference Result 923 states and 1166 transitions. [2022-11-03 02:30:19,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:30:19,053 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 52.0) internal successors, (156), 3 states have internal predecessors, (156), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 164 [2022-11-03 02:30:19,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:30:19,056 INFO L225 Difference]: With dead ends: 923 [2022-11-03 02:30:19,056 INFO L226 Difference]: Without dead ends: 665 [2022-11-03 02:30:19,057 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 489 GetRequests, 482 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2022-11-03 02:30:19,057 INFO L413 NwaCegarLoop]: 373 mSDtfsCounter, 85 mSDsluCounter, 296 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 669 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-03 02:30:19,058 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [93 Valid, 669 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-03 02:30:19,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 665 states. [2022-11-03 02:30:19,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 665 to 663. [2022-11-03 02:30:19,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 663 states, 635 states have (on average 1.2377952755905512) internal successors, (786), 647 states have internal predecessors, (786), 23 states have call successors, (23), 2 states have call predecessors, (23), 3 states have return successors, (28), 15 states have call predecessors, (28), 23 states have call successors, (28) [2022-11-03 02:30:19,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 663 states to 663 states and 837 transitions. [2022-11-03 02:30:19,093 INFO L78 Accepts]: Start accepts. Automaton has 663 states and 837 transitions. Word has length 164 [2022-11-03 02:30:19,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:30:19,094 INFO L495 AbstractCegarLoop]: Abstraction has 663 states and 837 transitions. [2022-11-03 02:30:19,094 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 52.0) internal successors, (156), 3 states have internal predecessors, (156), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-03 02:30:19,094 INFO L276 IsEmpty]: Start isEmpty. Operand 663 states and 837 transitions. [2022-11-03 02:30:19,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2022-11-03 02:30:19,097 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:30:19,097 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:30:19,123 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e319eaf-ddde-4fad-a2b7-1cdd6630dc0d/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (12)] Forceful destruction successful, exit code 0 [2022-11-03 02:30:19,352 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e319eaf-ddde-4fad-a2b7-1cdd6630dc0d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2022-11-03 02:30:19,520 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e319eaf-ddde-4fad-a2b7-1cdd6630dc0d/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e319eaf-ddde-4fad-a2b7-1cdd6630dc0d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:30:19,520 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:30:19,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:30:19,521 INFO L85 PathProgramCache]: Analyzing trace with hash 710910694, now seen corresponding path program 1 times [2022-11-03 02:30:19,522 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:30:19,522 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1211892407] [2022-11-03 02:30:19,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:30:19,523 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:30:19,523 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e319eaf-ddde-4fad-a2b7-1cdd6630dc0d/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:30:19,524 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e319eaf-ddde-4fad-a2b7-1cdd6630dc0d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:30:19,542 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e319eaf-ddde-4fad-a2b7-1cdd6630dc0d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2022-11-03 02:30:21,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:30:21,308 INFO L263 TraceCheckSpWp]: Trace formula consists of 1447 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-03 02:30:21,311 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:30:21,357 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 22 proven. 1 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-03 02:30:21,360 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:30:21,493 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 1 proven. 19 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-11-03 02:30:21,494 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:30:21,494 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1211892407] [2022-11-03 02:30:21,494 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1211892407] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:30:21,494 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [229423067] [2022-11-03 02:30:21,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:30:21,494 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:30:21,495 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e319eaf-ddde-4fad-a2b7-1cdd6630dc0d/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:30:21,499 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e319eaf-ddde-4fad-a2b7-1cdd6630dc0d/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:30:21,524 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e319eaf-ddde-4fad-a2b7-1cdd6630dc0d/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (14)] Waiting until timeout for monitored process [2022-11-03 02:30:23,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:30:23,918 INFO L263 TraceCheckSpWp]: Trace formula consists of 1447 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-03 02:30:23,922 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:30:23,973 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2022-11-03 02:30:23,973 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:30:23,973 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [229423067] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:30:23,974 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-03 02:30:23,974 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5, 5] total 9 [2022-11-03 02:30:23,974 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [94358432] [2022-11-03 02:30:23,974 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:30:23,975 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:30:23,975 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:30:23,975 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:30:23,976 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2022-11-03 02:30:23,976 INFO L87 Difference]: Start difference. First operand 663 states and 837 transitions. Second operand has 3 states, 3 states have (on average 51.333333333333336) internal successors, (154), 3 states have internal predecessors, (154), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-03 02:30:24,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:30:24,150 INFO L93 Difference]: Finished difference Result 881 states and 1145 transitions. [2022-11-03 02:30:24,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:30:24,150 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 51.333333333333336) internal successors, (154), 3 states have internal predecessors, (154), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 174 [2022-11-03 02:30:24,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:30:24,154 INFO L225 Difference]: With dead ends: 881 [2022-11-03 02:30:24,154 INFO L226 Difference]: Without dead ends: 726 [2022-11-03 02:30:24,155 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 519 GetRequests, 512 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2022-11-03 02:30:24,158 INFO L413 NwaCegarLoop]: 298 mSDtfsCounter, 6 mSDsluCounter, 283 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 581 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:30:24,158 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 581 Invalid, 68 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:30:24,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 726 states. [2022-11-03 02:30:24,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 726 to 723. [2022-11-03 02:30:24,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 723 states, 695 states have (on average 1.2172661870503596) internal successors, (846), 707 states have internal predecessors, (846), 23 states have call successors, (23), 2 states have call predecessors, (23), 3 states have return successors, (28), 15 states have call predecessors, (28), 23 states have call successors, (28) [2022-11-03 02:30:24,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 723 states to 723 states and 897 transitions. [2022-11-03 02:30:24,193 INFO L78 Accepts]: Start accepts. Automaton has 723 states and 897 transitions. Word has length 174 [2022-11-03 02:30:24,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:30:24,193 INFO L495 AbstractCegarLoop]: Abstraction has 723 states and 897 transitions. [2022-11-03 02:30:24,193 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 51.333333333333336) internal successors, (154), 3 states have internal predecessors, (154), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-03 02:30:24,194 INFO L276 IsEmpty]: Start isEmpty. Operand 723 states and 897 transitions. [2022-11-03 02:30:24,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2022-11-03 02:30:24,196 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:30:24,196 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:30:24,233 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e319eaf-ddde-4fad-a2b7-1cdd6630dc0d/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (14)] Forceful destruction successful, exit code 0 [2022-11-03 02:30:24,462 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e319eaf-ddde-4fad-a2b7-1cdd6630dc0d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2022-11-03 02:30:24,622 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e319eaf-ddde-4fad-a2b7-1cdd6630dc0d/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e319eaf-ddde-4fad-a2b7-1cdd6630dc0d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:30:24,622 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:30:24,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:30:24,622 INFO L85 PathProgramCache]: Analyzing trace with hash 492055976, now seen corresponding path program 1 times [2022-11-03 02:30:24,623 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:30:24,624 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [255610647] [2022-11-03 02:30:24,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:30:24,624 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:30:24,624 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e319eaf-ddde-4fad-a2b7-1cdd6630dc0d/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:30:24,625 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e319eaf-ddde-4fad-a2b7-1cdd6630dc0d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:30:24,667 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e319eaf-ddde-4fad-a2b7-1cdd6630dc0d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2022-11-03 02:30:26,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:30:26,606 INFO L263 TraceCheckSpWp]: Trace formula consists of 1448 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-03 02:30:26,610 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:30:26,704 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 22 proven. 1 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-03 02:30:26,704 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:30:26,826 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 1 proven. 19 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-11-03 02:30:26,826 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:30:26,826 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [255610647] [2022-11-03 02:30:26,826 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [255610647] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:30:26,827 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [634050751] [2022-11-03 02:30:26,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:30:26,827 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:30:26,827 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e319eaf-ddde-4fad-a2b7-1cdd6630dc0d/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:30:26,828 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e319eaf-ddde-4fad-a2b7-1cdd6630dc0d/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:30:26,830 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e319eaf-ddde-4fad-a2b7-1cdd6630dc0d/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (16)] Waiting until timeout for monitored process [2022-11-03 02:30:29,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:30:29,393 INFO L263 TraceCheckSpWp]: Trace formula consists of 1448 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-03 02:30:29,396 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:30:29,515 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 29 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-03 02:30:29,516 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:30:29,516 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [634050751] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:30:29,516 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-03 02:30:29,516 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5, 5] total 11 [2022-11-03 02:30:29,516 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [41629866] [2022-11-03 02:30:29,516 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:30:29,517 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 02:30:29,517 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:30:29,518 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 02:30:29,518 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2022-11-03 02:30:29,518 INFO L87 Difference]: Start difference. First operand 723 states and 897 transitions. Second operand has 5 states, 5 states have (on average 31.6) internal successors, (158), 5 states have internal predecessors, (158), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-03 02:30:29,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:30:29,635 INFO L93 Difference]: Finished difference Result 1303 states and 1625 transitions. [2022-11-03 02:30:29,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-03 02:30:29,636 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 31.6) internal successors, (158), 5 states have internal predecessors, (158), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 174 [2022-11-03 02:30:29,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:30:29,640 INFO L225 Difference]: With dead ends: 1303 [2022-11-03 02:30:29,640 INFO L226 Difference]: Without dead ends: 687 [2022-11-03 02:30:29,642 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 519 GetRequests, 510 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2022-11-03 02:30:29,643 INFO L413 NwaCegarLoop]: 394 mSDtfsCounter, 281 mSDsluCounter, 510 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 292 SdHoareTripleChecker+Valid, 904 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:30:29,644 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [292 Valid, 904 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:30:29,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 687 states. [2022-11-03 02:30:29,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 687 to 687. [2022-11-03 02:30:29,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 687 states, 659 states have (on average 1.197268588770865) internal successors, (789), 671 states have internal predecessors, (789), 23 states have call successors, (23), 2 states have call predecessors, (23), 3 states have return successors, (28), 15 states have call predecessors, (28), 23 states have call successors, (28) [2022-11-03 02:30:29,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 687 states to 687 states and 840 transitions. [2022-11-03 02:30:29,679 INFO L78 Accepts]: Start accepts. Automaton has 687 states and 840 transitions. Word has length 174 [2022-11-03 02:30:29,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:30:29,681 INFO L495 AbstractCegarLoop]: Abstraction has 687 states and 840 transitions. [2022-11-03 02:30:29,681 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 31.6) internal successors, (158), 5 states have internal predecessors, (158), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-03 02:30:29,681 INFO L276 IsEmpty]: Start isEmpty. Operand 687 states and 840 transitions. [2022-11-03 02:30:29,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2022-11-03 02:30:29,684 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:30:29,684 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:30:29,711 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e319eaf-ddde-4fad-a2b7-1cdd6630dc0d/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (16)] Forceful destruction successful, exit code 0 [2022-11-03 02:30:29,932 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e319eaf-ddde-4fad-a2b7-1cdd6630dc0d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2022-11-03 02:30:30,105 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e319eaf-ddde-4fad-a2b7-1cdd6630dc0d/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e319eaf-ddde-4fad-a2b7-1cdd6630dc0d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:30:30,106 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:30:30,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:30:30,106 INFO L85 PathProgramCache]: Analyzing trace with hash 1058783132, now seen corresponding path program 1 times [2022-11-03 02:30:30,107 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:30:30,107 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [517759060] [2022-11-03 02:30:30,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:30:30,107 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:30:30,107 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e319eaf-ddde-4fad-a2b7-1cdd6630dc0d/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:30:30,108 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e319eaf-ddde-4fad-a2b7-1cdd6630dc0d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:30:30,110 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e319eaf-ddde-4fad-a2b7-1cdd6630dc0d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2022-11-03 02:30:32,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:30:32,084 INFO L263 TraceCheckSpWp]: Trace formula consists of 1442 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-03 02:30:32,088 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:30:32,128 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 22 proven. 1 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-03 02:30:32,128 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:30:32,267 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 1 proven. 19 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-11-03 02:30:32,267 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:30:32,268 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [517759060] [2022-11-03 02:30:32,268 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [517759060] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:30:32,268 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1134547807] [2022-11-03 02:30:32,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:30:32,268 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:30:32,268 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e319eaf-ddde-4fad-a2b7-1cdd6630dc0d/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:30:32,271 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e319eaf-ddde-4fad-a2b7-1cdd6630dc0d/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:30:32,290 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e319eaf-ddde-4fad-a2b7-1cdd6630dc0d/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (18)] Waiting until timeout for monitored process [2022-11-03 02:30:35,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:30:35,073 INFO L263 TraceCheckSpWp]: Trace formula consists of 1442 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-03 02:30:35,075 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:30:35,448 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2022-11-03 02:30:35,448 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:30:35,448 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1134547807] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:30:35,448 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-03 02:30:35,448 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5, 5] total 10 [2022-11-03 02:30:35,449 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1014681684] [2022-11-03 02:30:35,449 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:30:35,449 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 02:30:35,449 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:30:35,450 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 02:30:35,450 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2022-11-03 02:30:35,450 INFO L87 Difference]: Start difference. First operand 687 states and 840 transitions. Second operand has 4 states, 4 states have (on average 38.5) internal successors, (154), 4 states have internal predecessors, (154), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-03 02:30:37,957 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 02:30:42,056 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 02:30:46,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:30:46,237 INFO L93 Difference]: Finished difference Result 1496 states and 1835 transitions. [2022-11-03 02:30:46,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-03 02:30:46,240 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 38.5) internal successors, (154), 4 states have internal predecessors, (154), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 174 [2022-11-03 02:30:46,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:30:46,244 INFO L225 Difference]: With dead ends: 1496 [2022-11-03 02:30:46,245 INFO L226 Difference]: Without dead ends: 931 [2022-11-03 02:30:46,246 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 520 GetRequests, 511 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2022-11-03 02:30:46,247 INFO L413 NwaCegarLoop]: 351 mSDtfsCounter, 543 mSDsluCounter, 272 mSDsCounter, 0 mSdLazyCounter, 149 mSolverCounterSat, 16 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 550 SdHoareTripleChecker+Valid, 623 SdHoareTripleChecker+Invalid, 167 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 149 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.7s IncrementalHoareTripleChecker+Time [2022-11-03 02:30:46,247 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [550 Valid, 623 Invalid, 167 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 149 Invalid, 2 Unknown, 0 Unchecked, 10.7s Time] [2022-11-03 02:30:46,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 931 states. [2022-11-03 02:30:46,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 931 to 554. [2022-11-03 02:30:46,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 554 states, 531 states have (on average 1.1864406779661016) internal successors, (630), 538 states have internal predecessors, (630), 18 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (23), 14 states have call predecessors, (23), 18 states have call successors, (23) [2022-11-03 02:30:46,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 554 states to 554 states and 671 transitions. [2022-11-03 02:30:46,283 INFO L78 Accepts]: Start accepts. Automaton has 554 states and 671 transitions. Word has length 174 [2022-11-03 02:30:46,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:30:46,284 INFO L495 AbstractCegarLoop]: Abstraction has 554 states and 671 transitions. [2022-11-03 02:30:46,284 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 38.5) internal successors, (154), 4 states have internal predecessors, (154), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-03 02:30:46,284 INFO L276 IsEmpty]: Start isEmpty. Operand 554 states and 671 transitions. [2022-11-03 02:30:46,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 182 [2022-11-03 02:30:46,287 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:30:46,287 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:30:46,330 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e319eaf-ddde-4fad-a2b7-1cdd6630dc0d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2022-11-03 02:30:46,529 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e319eaf-ddde-4fad-a2b7-1cdd6630dc0d/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (18)] Ended with exit code 0 [2022-11-03 02:30:46,702 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e319eaf-ddde-4fad-a2b7-1cdd6630dc0d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e319eaf-ddde-4fad-a2b7-1cdd6630dc0d/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt [2022-11-03 02:30:46,703 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:30:46,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:30:46,703 INFO L85 PathProgramCache]: Analyzing trace with hash -1629204528, now seen corresponding path program 1 times [2022-11-03 02:30:46,704 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:30:46,704 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [894115269] [2022-11-03 02:30:46,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:30:46,704 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:30:46,704 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e319eaf-ddde-4fad-a2b7-1cdd6630dc0d/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:30:46,705 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e319eaf-ddde-4fad-a2b7-1cdd6630dc0d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:30:46,706 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e319eaf-ddde-4fad-a2b7-1cdd6630dc0d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2022-11-03 02:30:48,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:30:48,720 INFO L263 TraceCheckSpWp]: Trace formula consists of 1457 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-03 02:30:48,722 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:30:48,758 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 22 proven. 1 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-03 02:30:48,759 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:30:48,893 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 1 proven. 19 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-11-03 02:30:48,894 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:30:48,894 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [894115269] [2022-11-03 02:30:48,894 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [894115269] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:30:48,894 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1762056996] [2022-11-03 02:30:48,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:30:48,894 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:30:48,894 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e319eaf-ddde-4fad-a2b7-1cdd6630dc0d/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:30:48,899 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e319eaf-ddde-4fad-a2b7-1cdd6630dc0d/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:30:48,922 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e319eaf-ddde-4fad-a2b7-1cdd6630dc0d/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (20)] Waiting until timeout for monitored process [2022-11-03 02:30:51,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:30:51,867 INFO L263 TraceCheckSpWp]: Trace formula consists of 1457 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-03 02:30:51,870 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:30:51,918 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2022-11-03 02:30:51,918 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:30:51,918 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1762056996] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:30:51,918 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-03 02:30:51,918 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5, 5] total 10 [2022-11-03 02:30:51,918 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [492392344] [2022-11-03 02:30:51,919 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:30:51,919 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 02:30:51,919 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:30:51,920 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 02:30:51,920 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2022-11-03 02:30:51,920 INFO L87 Difference]: Start difference. First operand 554 states and 671 transitions. Second operand has 4 states, 4 states have (on average 40.25) internal successors, (161), 4 states have internal predecessors, (161), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-03 02:30:52,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:30:52,070 INFO L93 Difference]: Finished difference Result 639 states and 783 transitions. [2022-11-03 02:30:52,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-03 02:30:52,071 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 40.25) internal successors, (161), 4 states have internal predecessors, (161), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 181 [2022-11-03 02:30:52,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:30:52,075 INFO L225 Difference]: With dead ends: 639 [2022-11-03 02:30:52,076 INFO L226 Difference]: Without dead ends: 542 [2022-11-03 02:30:52,076 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 541 GetRequests, 532 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2022-11-03 02:30:52,077 INFO L413 NwaCegarLoop]: 282 mSDtfsCounter, 79 mSDsluCounter, 492 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 774 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:30:52,077 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [84 Valid, 774 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:30:52,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 542 states. [2022-11-03 02:30:52,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 542 to 537. [2022-11-03 02:30:52,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 537 states, 514 states have (on average 1.171206225680934) internal successors, (602), 521 states have internal predecessors, (602), 18 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (23), 14 states have call predecessors, (23), 18 states have call successors, (23) [2022-11-03 02:30:52,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 537 states to 537 states and 643 transitions. [2022-11-03 02:30:52,109 INFO L78 Accepts]: Start accepts. Automaton has 537 states and 643 transitions. Word has length 181 [2022-11-03 02:30:52,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:30:52,110 INFO L495 AbstractCegarLoop]: Abstraction has 537 states and 643 transitions. [2022-11-03 02:30:52,110 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 40.25) internal successors, (161), 4 states have internal predecessors, (161), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-03 02:30:52,110 INFO L276 IsEmpty]: Start isEmpty. Operand 537 states and 643 transitions. [2022-11-03 02:30:52,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 182 [2022-11-03 02:30:52,113 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:30:52,113 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:30:52,158 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e319eaf-ddde-4fad-a2b7-1cdd6630dc0d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2022-11-03 02:30:52,374 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e319eaf-ddde-4fad-a2b7-1cdd6630dc0d/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (20)] Forceful destruction successful, exit code 0 [2022-11-03 02:30:52,534 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e319eaf-ddde-4fad-a2b7-1cdd6630dc0d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e319eaf-ddde-4fad-a2b7-1cdd6630dc0d/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt [2022-11-03 02:30:52,534 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:30:52,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:30:52,535 INFO L85 PathProgramCache]: Analyzing trace with hash 279599070, now seen corresponding path program 1 times [2022-11-03 02:30:52,535 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:30:52,535 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1882519734] [2022-11-03 02:30:52,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:30:52,536 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:30:52,536 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e319eaf-ddde-4fad-a2b7-1cdd6630dc0d/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:30:52,537 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e319eaf-ddde-4fad-a2b7-1cdd6630dc0d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:30:52,540 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e319eaf-ddde-4fad-a2b7-1cdd6630dc0d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2022-11-03 02:30:54,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:30:54,599 INFO L263 TraceCheckSpWp]: Trace formula consists of 1450 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-03 02:30:54,601 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:30:54,637 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 22 proven. 1 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-03 02:30:54,638 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:30:54,758 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 1 proven. 19 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-11-03 02:30:54,758 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:30:54,758 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1882519734] [2022-11-03 02:30:54,758 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1882519734] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:30:54,759 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1291782611] [2022-11-03 02:30:54,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:30:54,759 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:30:54,759 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e319eaf-ddde-4fad-a2b7-1cdd6630dc0d/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:30:54,760 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e319eaf-ddde-4fad-a2b7-1cdd6630dc0d/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:30:54,761 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e319eaf-ddde-4fad-a2b7-1cdd6630dc0d/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (22)] Waiting until timeout for monitored process [2022-11-03 02:30:58,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:30:58,518 INFO L263 TraceCheckSpWp]: Trace formula consists of 1450 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-03 02:30:58,521 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:30:58,540 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 22 proven. 1 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-03 02:30:58,540 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:30:58,601 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 1 proven. 19 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-11-03 02:30:58,601 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1291782611] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:30:58,601 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1224037649] [2022-11-03 02:30:58,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:30:58,602 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:30:58,602 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e319eaf-ddde-4fad-a2b7-1cdd6630dc0d/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:30:58,604 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e319eaf-ddde-4fad-a2b7-1cdd6630dc0d/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:30:58,605 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e319eaf-ddde-4fad-a2b7-1cdd6630dc0d/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-11-03 02:31:00,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:31:00,646 INFO L263 TraceCheckSpWp]: Trace formula consists of 1450 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-03 02:31:00,649 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:31:00,991 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2022-11-03 02:31:00,991 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:31:01,410 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2022-11-03 02:31:01,410 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1224037649] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:31:01,410 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 02:31:01,411 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 4, 4] total 12 [2022-11-03 02:31:01,411 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [814905721] [2022-11-03 02:31:01,411 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 02:31:01,412 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-03 02:31:01,412 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:31:01,412 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-03 02:31:01,413 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2022-11-03 02:31:01,413 INFO L87 Difference]: Start difference. First operand 537 states and 643 transitions. Second operand has 12 states, 12 states have (on average 32.75) internal successors, (393), 12 states have internal predecessors, (393), 4 states have call successors, (15), 2 states have call predecessors, (15), 4 states have return successors, (16), 3 states have call predecessors, (16), 4 states have call successors, (16) [2022-11-03 02:31:03,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:31:03,059 INFO L93 Difference]: Finished difference Result 1837 states and 2277 transitions. [2022-11-03 02:31:03,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-03 02:31:03,060 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 32.75) internal successors, (393), 12 states have internal predecessors, (393), 4 states have call successors, (15), 2 states have call predecessors, (15), 4 states have return successors, (16), 3 states have call predecessors, (16), 4 states have call successors, (16) Word has length 181 [2022-11-03 02:31:03,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:31:03,065 INFO L225 Difference]: With dead ends: 1837 [2022-11-03 02:31:03,065 INFO L226 Difference]: Without dead ends: 1347 [2022-11-03 02:31:03,067 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1087 GetRequests, 1071 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=80, Invalid=226, Unknown=0, NotChecked=0, Total=306 [2022-11-03 02:31:03,068 INFO L413 NwaCegarLoop]: 489 mSDtfsCounter, 1423 mSDsluCounter, 1829 mSDsCounter, 0 mSdLazyCounter, 240 mSolverCounterSat, 136 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1459 SdHoareTripleChecker+Valid, 2318 SdHoareTripleChecker+Invalid, 376 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 136 IncrementalHoareTripleChecker+Valid, 240 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-11-03 02:31:03,068 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1459 Valid, 2318 Invalid, 376 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [136 Valid, 240 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-11-03 02:31:03,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1347 states. [2022-11-03 02:31:03,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1347 to 1197. [2022-11-03 02:31:03,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1197 states, 1152 states have (on average 1.1822916666666667) internal successors, (1362), 1159 states have internal predecessors, (1362), 39 states have call successors, (39), 3 states have call predecessors, (39), 4 states have return successors, (53), 35 states have call predecessors, (53), 39 states have call successors, (53) [2022-11-03 02:31:03,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1197 states to 1197 states and 1454 transitions. [2022-11-03 02:31:03,204 INFO L78 Accepts]: Start accepts. Automaton has 1197 states and 1454 transitions. Word has length 181 [2022-11-03 02:31:03,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:31:03,205 INFO L495 AbstractCegarLoop]: Abstraction has 1197 states and 1454 transitions. [2022-11-03 02:31:03,205 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 32.75) internal successors, (393), 12 states have internal predecessors, (393), 4 states have call successors, (15), 2 states have call predecessors, (15), 4 states have return successors, (16), 3 states have call predecessors, (16), 4 states have call successors, (16) [2022-11-03 02:31:03,205 INFO L276 IsEmpty]: Start isEmpty. Operand 1197 states and 1454 transitions. [2022-11-03 02:31:03,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 484 [2022-11-03 02:31:03,210 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:31:03,211 INFO L195 NwaCegarLoop]: trace histogram [12, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:31:03,250 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e319eaf-ddde-4fad-a2b7-1cdd6630dc0d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2022-11-03 02:31:03,472 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e319eaf-ddde-4fad-a2b7-1cdd6630dc0d/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (22)] Forceful destruction successful, exit code 0 [2022-11-03 02:31:03,677 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e319eaf-ddde-4fad-a2b7-1cdd6630dc0d/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-11-03 02:31:03,835 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e319eaf-ddde-4fad-a2b7-1cdd6630dc0d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e319eaf-ddde-4fad-a2b7-1cdd6630dc0d/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e319eaf-ddde-4fad-a2b7-1cdd6630dc0d/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:31:03,835 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:31:03,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:31:03,835 INFO L85 PathProgramCache]: Analyzing trace with hash -1594843483, now seen corresponding path program 1 times [2022-11-03 02:31:03,837 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:31:03,837 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [380615329] [2022-11-03 02:31:03,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:31:03,838 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:31:03,838 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e319eaf-ddde-4fad-a2b7-1cdd6630dc0d/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:31:03,838 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e319eaf-ddde-4fad-a2b7-1cdd6630dc0d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:31:03,843 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e319eaf-ddde-4fad-a2b7-1cdd6630dc0d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2022-11-03 02:31:13,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:31:14,056 INFO L263 TraceCheckSpWp]: Trace formula consists of 7499 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-03 02:31:14,064 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:31:14,164 INFO L134 CoverageAnalysis]: Checked inductivity of 718 backedges. 173 proven. 10 refuted. 0 times theorem prover too weak. 535 trivial. 0 not checked. [2022-11-03 02:31:14,164 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:31:14,458 INFO L134 CoverageAnalysis]: Checked inductivity of 718 backedges. 109 proven. 71 refuted. 0 times theorem prover too weak. 538 trivial. 0 not checked. [2022-11-03 02:31:14,458 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:31:14,458 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [380615329] [2022-11-03 02:31:14,459 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [380615329] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:31:14,459 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1746094383] [2022-11-03 02:31:14,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:31:14,459 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:31:14,459 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e319eaf-ddde-4fad-a2b7-1cdd6630dc0d/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:31:14,467 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e319eaf-ddde-4fad-a2b7-1cdd6630dc0d/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:31:14,490 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e319eaf-ddde-4fad-a2b7-1cdd6630dc0d/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (25)] Waiting until timeout for monitored process [2022-11-03 02:31:26,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:31:26,367 INFO L263 TraceCheckSpWp]: Trace formula consists of 7499 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-03 02:31:26,373 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:31:26,407 INFO L134 CoverageAnalysis]: Checked inductivity of 718 backedges. 173 proven. 10 refuted. 0 times theorem prover too weak. 535 trivial. 0 not checked. [2022-11-03 02:31:26,408 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:31:26,546 INFO L134 CoverageAnalysis]: Checked inductivity of 718 backedges. 109 proven. 71 refuted. 0 times theorem prover too weak. 538 trivial. 0 not checked. [2022-11-03 02:31:26,546 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1746094383] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:31:26,546 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [652517178] [2022-11-03 02:31:26,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:31:26,546 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:31:26,547 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e319eaf-ddde-4fad-a2b7-1cdd6630dc0d/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:31:26,548 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e319eaf-ddde-4fad-a2b7-1cdd6630dc0d/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:31:26,568 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e319eaf-ddde-4fad-a2b7-1cdd6630dc0d/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-11-03 02:31:36,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:31:36,420 INFO L263 TraceCheckSpWp]: Trace formula consists of 7499 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-03 02:31:36,428 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:31:36,525 INFO L134 CoverageAnalysis]: Checked inductivity of 718 backedges. 202 proven. 3 refuted. 0 times theorem prover too weak. 513 trivial. 0 not checked. [2022-11-03 02:31:36,526 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:31:36,787 INFO L134 CoverageAnalysis]: Checked inductivity of 718 backedges. 126 proven. 31 refuted. 0 times theorem prover too weak. 561 trivial. 0 not checked. [2022-11-03 02:31:36,787 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [652517178] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:31:36,788 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 02:31:36,788 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8, 8, 6, 6] total 20 [2022-11-03 02:31:36,788 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [673103125] [2022-11-03 02:31:36,789 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 02:31:36,790 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-11-03 02:31:36,790 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:31:36,791 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-11-03 02:31:36,791 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=265, Unknown=0, NotChecked=0, Total=380 [2022-11-03 02:31:36,791 INFO L87 Difference]: Start difference. First operand 1197 states and 1454 transitions. Second operand has 20 states, 20 states have (on average 11.5) internal successors, (230), 20 states have internal predecessors, (230), 2 states have call successors, (8), 2 states have call predecessors, (8), 6 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2022-11-03 02:31:38,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:31:38,562 INFO L93 Difference]: Finished difference Result 2373 states and 3017 transitions. [2022-11-03 02:31:38,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-11-03 02:31:38,567 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 11.5) internal successors, (230), 20 states have internal predecessors, (230), 2 states have call successors, (8), 2 states have call predecessors, (8), 6 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) Word has length 483 [2022-11-03 02:31:38,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:31:38,573 INFO L225 Difference]: With dead ends: 2373 [2022-11-03 02:31:38,573 INFO L226 Difference]: Without dead ends: 1217 [2022-11-03 02:31:38,576 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2917 GetRequests, 2874 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 456 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=554, Invalid=1426, Unknown=0, NotChecked=0, Total=1980 [2022-11-03 02:31:38,577 INFO L413 NwaCegarLoop]: 296 mSDtfsCounter, 141 mSDsluCounter, 2588 mSDsCounter, 0 mSdLazyCounter, 292 mSolverCounterSat, 81 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 141 SdHoareTripleChecker+Valid, 2884 SdHoareTripleChecker+Invalid, 373 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 81 IncrementalHoareTripleChecker+Valid, 292 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-03 02:31:38,577 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [141 Valid, 2884 Invalid, 373 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [81 Valid, 292 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-03 02:31:38,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1217 states. [2022-11-03 02:31:38,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1217 to 1209. [2022-11-03 02:31:38,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1209 states, 1164 states have (on average 1.1838487972508591) internal successors, (1378), 1171 states have internal predecessors, (1378), 39 states have call successors, (39), 3 states have call predecessors, (39), 4 states have return successors, (53), 35 states have call predecessors, (53), 39 states have call successors, (53) [2022-11-03 02:31:38,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1209 states to 1209 states and 1470 transitions. [2022-11-03 02:31:38,733 INFO L78 Accepts]: Start accepts. Automaton has 1209 states and 1470 transitions. Word has length 483 [2022-11-03 02:31:38,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:31:38,733 INFO L495 AbstractCegarLoop]: Abstraction has 1209 states and 1470 transitions. [2022-11-03 02:31:38,734 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 11.5) internal successors, (230), 20 states have internal predecessors, (230), 2 states have call successors, (8), 2 states have call predecessors, (8), 6 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2022-11-03 02:31:38,734 INFO L276 IsEmpty]: Start isEmpty. Operand 1209 states and 1470 transitions. [2022-11-03 02:31:38,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 508 [2022-11-03 02:31:38,740 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:31:38,740 INFO L195 NwaCegarLoop]: trace histogram [36, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:31:38,800 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e319eaf-ddde-4fad-a2b7-1cdd6630dc0d/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (25)] Forceful destruction successful, exit code 0 [2022-11-03 02:31:39,084 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e319eaf-ddde-4fad-a2b7-1cdd6630dc0d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (24)] Forceful destruction successful, exit code 0 [2022-11-03 02:31:39,302 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e319eaf-ddde-4fad-a2b7-1cdd6630dc0d/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2022-11-03 02:31:39,367 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e319eaf-ddde-4fad-a2b7-1cdd6630dc0d/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e319eaf-ddde-4fad-a2b7-1cdd6630dc0d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e319eaf-ddde-4fad-a2b7-1cdd6630dc0d/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:31:39,368 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:31:39,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:31:39,368 INFO L85 PathProgramCache]: Analyzing trace with hash -1570235227, now seen corresponding path program 2 times [2022-11-03 02:31:39,370 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:31:39,370 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1764155368] [2022-11-03 02:31:39,370 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-03 02:31:39,370 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:31:39,370 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e319eaf-ddde-4fad-a2b7-1cdd6630dc0d/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:31:39,371 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e319eaf-ddde-4fad-a2b7-1cdd6630dc0d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:31:39,373 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e319eaf-ddde-4fad-a2b7-1cdd6630dc0d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2022-11-03 02:31:50,690 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-03 02:31:50,690 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 02:31:51,184 INFO L263 TraceCheckSpWp]: Trace formula consists of 7763 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-03 02:31:51,195 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:31:51,444 INFO L134 CoverageAnalysis]: Checked inductivity of 1378 backedges. 437 proven. 55 refuted. 0 times theorem prover too weak. 886 trivial. 0 not checked. [2022-11-03 02:31:51,444 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:31:52,289 INFO L134 CoverageAnalysis]: Checked inductivity of 1378 backedges. 109 proven. 380 refuted. 0 times theorem prover too weak. 889 trivial. 0 not checked. [2022-11-03 02:31:52,290 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:31:52,290 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1764155368] [2022-11-03 02:31:52,290 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1764155368] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:31:52,290 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1528372787] [2022-11-03 02:31:52,290 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-03 02:31:52,290 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:31:52,290 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e319eaf-ddde-4fad-a2b7-1cdd6630dc0d/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:31:52,291 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e319eaf-ddde-4fad-a2b7-1cdd6630dc0d/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:31:52,294 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e319eaf-ddde-4fad-a2b7-1cdd6630dc0d/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (28)] Waiting until timeout for monitored process [2022-11-03 02:32:06,189 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-03 02:32:06,189 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 02:32:06,581 INFO L263 TraceCheckSpWp]: Trace formula consists of 7763 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-03 02:32:06,590 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:32:06,647 INFO L134 CoverageAnalysis]: Checked inductivity of 1378 backedges. 437 proven. 55 refuted. 0 times theorem prover too weak. 886 trivial. 0 not checked. [2022-11-03 02:32:06,648 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:32:07,012 INFO L134 CoverageAnalysis]: Checked inductivity of 1378 backedges. 109 proven. 380 refuted. 0 times theorem prover too weak. 889 trivial. 0 not checked. [2022-11-03 02:32:07,013 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1528372787] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:32:07,013 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1301906892] [2022-11-03 02:32:07,013 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-03 02:32:07,013 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:32:07,013 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e319eaf-ddde-4fad-a2b7-1cdd6630dc0d/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:32:07,014 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e319eaf-ddde-4fad-a2b7-1cdd6630dc0d/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:32:07,015 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e319eaf-ddde-4fad-a2b7-1cdd6630dc0d/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-11-03 02:32:17,687 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-03 02:32:17,687 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 02:32:18,055 INFO L263 TraceCheckSpWp]: Trace formula consists of 7763 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-03 02:32:18,061 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:32:19,366 INFO L134 CoverageAnalysis]: Checked inductivity of 1378 backedges. 0 proven. 580 refuted. 0 times theorem prover too weak. 798 trivial. 0 not checked. [2022-11-03 02:32:19,366 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:32:21,110 INFO L134 CoverageAnalysis]: Checked inductivity of 1378 backedges. 0 proven. 580 refuted. 0 times theorem prover too weak. 798 trivial. 0 not checked. [2022-11-03 02:32:21,111 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1301906892] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:32:21,111 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 02:32:21,111 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14, 14, 7, 7] total 36 [2022-11-03 02:32:21,111 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1769946199] [2022-11-03 02:32:21,111 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 02:32:21,113 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-11-03 02:32:21,113 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:32:21,114 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-11-03 02:32:21,114 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=238, Invalid=1022, Unknown=0, NotChecked=0, Total=1260 [2022-11-03 02:32:21,115 INFO L87 Difference]: Start difference. First operand 1209 states and 1470 transitions. Second operand has 36 states, 36 states have (on average 28.88888888888889) internal successors, (1040), 36 states have internal predecessors, (1040), 4 states have call successors, (15), 2 states have call predecessors, (15), 4 states have return successors, (16), 3 states have call predecessors, (16), 4 states have call successors, (16) [2022-11-03 02:32:43,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:32:43,546 INFO L93 Difference]: Finished difference Result 4740 states and 6254 transitions. [2022-11-03 02:32:43,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2022-11-03 02:32:43,548 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 28.88888888888889) internal successors, (1040), 36 states have internal predecessors, (1040), 4 states have call successors, (15), 2 states have call predecessors, (15), 4 states have return successors, (16), 3 states have call predecessors, (16), 4 states have call successors, (16) Word has length 507 [2022-11-03 02:32:43,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:32:43,563 INFO L225 Difference]: With dead ends: 4740 [2022-11-03 02:32:43,563 INFO L226 Difference]: Without dead ends: 3574 [2022-11-03 02:32:43,568 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3075 GetRequests, 3006 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 577 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=1091, Invalid=3879, Unknown=0, NotChecked=0, Total=4970 [2022-11-03 02:32:43,569 INFO L413 NwaCegarLoop]: 1311 mSDtfsCounter, 4114 mSDsluCounter, 22021 mSDsCounter, 0 mSdLazyCounter, 5384 mSolverCounterSat, 1308 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 16.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4286 SdHoareTripleChecker+Valid, 23332 SdHoareTripleChecker+Invalid, 6692 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1308 IncrementalHoareTripleChecker+Valid, 5384 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 18.5s IncrementalHoareTripleChecker+Time [2022-11-03 02:32:43,570 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4286 Valid, 23332 Invalid, 6692 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1308 Valid, 5384 Invalid, 0 Unknown, 0 Unchecked, 18.5s Time] [2022-11-03 02:32:43,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3574 states. [2022-11-03 02:32:43,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3574 to 3186. [2022-11-03 02:32:43,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3186 states, 3081 states have (on average 1.1775397598182409) internal successors, (3628), 3088 states have internal predecessors, (3628), 99 states have call successors, (99), 3 states have call predecessors, (99), 4 states have return successors, (137), 95 states have call predecessors, (137), 99 states have call successors, (137) [2022-11-03 02:32:43,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3186 states to 3186 states and 3864 transitions. [2022-11-03 02:32:43,890 INFO L78 Accepts]: Start accepts. Automaton has 3186 states and 3864 transitions. Word has length 507 [2022-11-03 02:32:43,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:32:43,891 INFO L495 AbstractCegarLoop]: Abstraction has 3186 states and 3864 transitions. [2022-11-03 02:32:43,892 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 28.88888888888889) internal successors, (1040), 36 states have internal predecessors, (1040), 4 states have call successors, (15), 2 states have call predecessors, (15), 4 states have return successors, (16), 3 states have call predecessors, (16), 4 states have call successors, (16) [2022-11-03 02:32:43,892 INFO L276 IsEmpty]: Start isEmpty. Operand 3186 states and 3864 transitions. [2022-11-03 02:32:43,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1126 [2022-11-03 02:32:43,910 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:32:43,911 INFO L195 NwaCegarLoop]: trace histogram [66, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:32:44,073 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e319eaf-ddde-4fad-a2b7-1cdd6630dc0d/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2022-11-03 02:32:44,242 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e319eaf-ddde-4fad-a2b7-1cdd6630dc0d/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (28)] Forceful destruction successful, exit code 0 [2022-11-03 02:32:44,452 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e319eaf-ddde-4fad-a2b7-1cdd6630dc0d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (27)] Forceful destruction successful, exit code 0 [2022-11-03 02:32:44,535 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e319eaf-ddde-4fad-a2b7-1cdd6630dc0d/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e319eaf-ddde-4fad-a2b7-1cdd6630dc0d/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e319eaf-ddde-4fad-a2b7-1cdd6630dc0d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:32:44,535 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:32:44,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:32:44,536 INFO L85 PathProgramCache]: Analyzing trace with hash -1087986307, now seen corresponding path program 3 times [2022-11-03 02:32:44,539 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:32:44,540 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2137077294] [2022-11-03 02:32:44,540 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-03 02:32:44,540 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:32:44,540 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e319eaf-ddde-4fad-a2b7-1cdd6630dc0d/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:32:44,541 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e319eaf-ddde-4fad-a2b7-1cdd6630dc0d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:32:44,542 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e319eaf-ddde-4fad-a2b7-1cdd6630dc0d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (30)] Waiting until timeout for monitored process